The fact that Altarrin is visibly a very wealthy mage, visibly very much in a hurry, and barely speaks the language are all not helping at all with his haggling ability. This is fine, though, because being a mysterious wealthy mage from an inland country carrying three pounds of gold, while it certainly gets more curiosity and attention than he'd prefer, also gets four different gem-merchants coming to him to show off their inventory. His main challenge is communicating that, no, he does not in fact want this other precious stone that is Even Rarer And Prettier Than A Diamond but will generously be sold to him for the same price, he just wants diamonds. The biggest they have, the necessary size wasn't specified but large diamonds can be cut and smaller ones cannot be glued together.
Even all of the top gem-merchants of the biggest and richest port market on the continent don't have that many large uncut unflawed diamonds (in general they can be sold for more once they're actually made into jewelry and Altarrin has no idea if the diamonds having been already cut is a problem, and he's certainly not interested in paying extra for diamonds that are probably less useful). If he were willing to haggle, he might be able to buy out nearly all of their inventory of not-already-in-jewelry diamonds.
He is, however, in a hurry; he doesn't know how long it will take the Empire to find someone who can get through his shields against scrying, and he's not entirely sure that he's out of range of any possible Gates, they could do multiple hops. He's out of gold, but hopefully even a small box, holding 41 diamonds - in a range of sizes, but over a dozen are spectacularly huge as diamonds go, half an inch in diameter or more, and most of the rest are at least notably big - will be at least an adequate opening gift.
(He wonders if you could use mage-gift to make diamonds. It doesn't seem impossible, if for some reason it were worth several months to design an artifact for it, the spell that comes to mind would have to be overpowered enough that no mage could cast it - the belt doesn't really help with peak channeling capacity, which would be the limitation rather than total reserves.)
He pays up, and takes his box of diamonds, and Gates to a different records cache - on an island off the southwestern coast, over 2000 miles from the nearest border of the Empire.
It's been another half-candlemark. Nearly three candlemarks since he dropped the last reply letter, and he didn't even get a look on scrying that time. His reserves are...actually recovered since he Gated out. (The merchants were very very eager to make him feel welcome and served snacks, and the Gate only took out a tiny bite.)
He's...actually kind of worried about drawing the attention of Tar-Baphon, and he still isn't sure if the scrying is detectable by the magic of Iomedae's world, but it's - information - he is very reluctant to Gate anywhere without knowing Iomedae's status - he has to anyway but if she's in the middle of a battle and can't be interrupted then that might affect whether he wants to Gate into her people's camp versus somewhere on the other side of the planet. Probably he needs to Gate to her camp anyway, though, he - needs - her help - (a thought that doesn't finish) -
He tries to scry for Iomedae, first.