The portal flickers slightly oddly, and she appears against a featureless white floor with a series of glowing blue wards complimenting a spherical forcefield centered around her entry point.
Space warps slightly and a scanning beam and divinatory array peak out from subspace, looking for dangerous infections and contaminants. 

This would appear to be a portal trap. Excellent...? She doesn't feel chron spending yet, so hopefully it's not about to incinerate her. 

She casts a glance over her shoulder and verifies that the door is gone. 

The portal fades undisturbedly, whatever magic it uses not interfering with the normal operation of it. 
A simple text window appears before her.
Would you like to be dropped off at your original portal location or would you like to enjoy the facilities and orientation of the Starscape Bazaar?

"Starscape Bazaar, please."

She teleports into a vast hall, dozens and dozens of people flooding through them, moving from one shop to the next. A few hundred meters up you can see the flickering aurora of the wards upon this place, ghost-light not impeding the brilliant view of the stars above. 
The crowd is mostly humans, though a good fraction of them possess physical or magical abnormalities - a handful have ears reminiscent of elves, some have odd skin tones and eye shapes, and even extra arms and horns and gills. There's a handful of assorted aliens as well, ranging from conventionally humanoid to things merely in that rough shape. None of them seem to be much surprised by your appearance.
A handful of psychic probes and magical scans brush against your mind and defenses idly, looking out for threats and interesting customers relatively unobtrusively.
A knot of magic appears around her hand, telling her it can help her summon someone to orient her here, as the dialog said.

Thorn squees. Not only is this a super interesting world, it's easy! 

(There's a little pang of disappointment there too. An easy one. But oh well.) 

She could go for the guided tour and contact the powers that be faster, or she could dive in and get a better understanding of the world as it is. She picks the latter, setting off down the hall to have a better look at the shops.

The hall is perhaps three-quarters filled with fairly conventional earth shops - half-a-dozen fast food places, stands of books and fruit and souvenirs both themed around Earth and the Bazaar itself. Even so, you spot some magical oddities in them - low powered charms for good luck and mental focus amongst purely aesthetic ones and subtle rune work interwoven into many of the stalls and shops to help preserve and enhance the quality of there wares> 
The rest is... odd. 
One of the shops has an elaborate tapestry of superpowered heroes fighting, floating in a non-existent wind through some exotic material woven into them, hovering off a costume shop, another places is a little forest of psychically active crystals and there's a handful of intricately warded glass cases that seem to hold some fairly potent magic items strewn throughout the hall.
Just to the left of her is store shining with chrome and neon highlights of forcefields and metal showing of hundreds of different contraptions manufactured with the signature precision of a nanoforge.
There's even a handful of stalls that just have a desk and a person waiting behind them, and a small sign describing what service they offer.

The tech readings underestimated this place by a long shot. 

She wanders a shop or two to give herself time to watch a few people pay for things. How does it seem to work?

The shops seem to take a standard currency - scrip of some shining metamaterials, though she might notice a few people negotiating to pay in services rendered or alternative payment options.

The simple gold she's brought might be as valuable as modern-day aluminum, here. Then again, it's a very heavy element and therefore difficult to synthesize even in a nanoforge. Magic might change that though, which would explain the metamaterial currency. 

She considers for a long moment.

She crosses the space to a relatively quiet corner,  then snaps the mana-knot that should summon a guide. 

She snaps into existence next to you, and waves. "Hello traveller! How can I help you?"

She has the aura of a powerful mage, and tattoos of ludicrously dangerous dimensional magic written across her skin that somehow don't seem to be doing anything to the world around her.

Someone like this has seen stranger things than me. 

"Hello! I represent a multiversal trade consortium that's looking to establish ties with this dimension. Who should I be speaking to about that?" 

"I'm a suitable representative. Well, at least for Earth and a handful of other places around here." 
She smiles and space warps so she can shake her hand quickly. 
"I'm the Dimensioneer. You are...?"
"Anyways, you could you tell me what your trading consortium sells...?"

"I'm Thorn, and I represent the OTC. We trade in time, energy, information, lifespan, sacrifice and expertise. Also exotics from across many worlds. Everything ethically sourced, of course."

She raises her eyebrows at a few of those. "We'll have to double-check our definitions of ethical match each others, of course." She idly waves her hand and teleports them to a comfortable meeting room, and flops back onto a plush sofa. 
"Lifespan probably isn't that valuable to us - there are... relatively simple ways to extended most forms of life indefinitely through proper care - the personal magical medicine revolution is going fairly well, but..." She pauses. "What can you apply lifespan to? There's a bunch of bioanaylsts that would love the ability to extend the life of exotic beings that sort of thing is less applicable to, and we don't have widespread truly adequate stabilization care, so there would probably be a market for that here." 
"And I suppose I'd have to ask what you mean by "Energy"? There's a lot of different things that can mean here."
"And I'll throw in the same question about Sacrifice and Expertise." 
"Information is always good, though it really depends on the information you have to offer." 
"Time is really valuable to more or less everyone, though I know that I'm more free of that kind of concern then most,"
"I'm not qualified to analyze all exotics, of course, but I can take a look if you have some samples...?"
"And I suppose we can talk about what we can offer you afterwards."

Thorn takes a seat. "I don't have samples of our library of exotics physically on me; that would require a gate or teleport into your universe which I gather is closely controlled. This is a scouting mission. All I have on me is alloyed gold. As for the rest, all lifespan and so on is minted from volunteers for whom it is relatively unimportant. Sacrifice is primarily pain, and can be safely produced by any number of consensual activities. Energy is energy; electrical energy, mental fatigue, physical fatigue. The principle that keeps things moving and generates order in opposition of entropy. We have many high-powered, even "godlike" members on staff or as contractors; we pay for their time in a unified currency backed by "the combined expertise of OTC", all the things all our contractors can do. You can apply lifespan to anything biological."

"That doesn't really answer my question - How biological does it need to be to work? Can it be used for 'ressurections'? Is it in pure time to live or relative to normal lifespan?"
"Gating or teleporting in things isn't actually as closely controlled as you might think - the thing is that you used an unrecognized extradimensional portal that our systems didn't have enough time to be able to analyze to contents of it well enough to get a workable read - we don't mind extradimensional visitors but when the next 'visitor' could be say, a planet-busting bomb..."

"It doesn't work on dead things. It's absolute time and not a percentage. About 75% biological, really heavy augmentations can start to interfere. And it's fine; I understand the need to be cautious."

"Oh that will be lovely to have. "
She shivers excitedly.
"Oh, and I might as well ask: Does it have the same sort of problem with transubstantiated / partially spiritual organisms as it does with more conventional augmentations...? Oh, and how does it work with fissioning organisms?"

"Similar, don't know off the top of my head."

She nods.
"That's alright - I suppose we can always settle that in individualized negotiations."
"All of that should be useful though..." 
She sighs a little frustratedly. 
"There's probably only around... A million people who are genuinely going to be capable of participating on a personal level in this - the... 'metahuman community' here is relatively small fraction of the population of the planet are mages or psychics or 'mutants' of enough power to be of much relevance for this sort of trade deal. Mostly, we can offer large quantities of low grade exotic supplies and earth cultural material, and somewhat lesser supplies of the kind of powerful technology and magic and psychic abilities that you can see here in exchange for that sort of thing."

"There are a lot of Earths. Your culture will of course be unique, but it's perhaps of less value than you expected. We'll take what we can get; many planes are far lower-return than this one."

"I figured - I know it's valuable in space but... I'm far from unaware of that problem."
"I hope that we can work out some initial transactions to the benefits of all of us - getting past the basic investigatory steps and to the point where we can really have the full fledged trading is a nightmare even totally divorced from the usual logistics problems of travel - but... It seems like we both have a good deal that we could do for each other." 
She brushes her hair back, and smiles softly. 
"Is there anywhere you'd like to start for a deeper probe into what we can give...? I'm afraid there's no simple itemized listing of what we might be able to offer, but I can at least give you a guideline better then what the public net should be able to. Perhaps showing you around here...?"

"I learn best from experience. Give me the guided tour."

"Alright!"
She beams softly, and takes her hand gently. "Off we go!"

A standard college campus appears, then she teleports again into a central room filled with a workshops of magic, technology and psychic abilities all around them. The air is heavy with warding magic, and there's a huge quantity of lingering exotic energies everywhere. 
"This is Silver's school - He's a... 'god-like' mage, I suppose, though we've checked and he's actually a baseline mage, for whatever that's worth."
A listing pops up of a few hundred students. Many of them have metahuman abilities noted that would be tremendously valuable somewhere, at least in a fully realized state. Geokinesis, transmutation, permanent and merely lasting augmentations. A few of them are incredibly strong, but the average of them 'merely' capable combatants with some interesting utility that could support a small buisness somewhere. 
"There's a lot here. The temporal facilities are a favourite of mine~, but you should probably check out the students in more depth first." 
She laughs excitedly.