Aniol likes Abdarans because they're allowed to want things. They've got a lot of fancy math tricks on top of it but the root of it is that Abadaranism is about figuring out what you want and how much you want it.
The thing he wants isn't for sale. He cannot legally contact his soul's owner, at the moment, what with how happy the convention was to make it illegal to do anything whatever with devils for any reason, and once the business was wrapped up all his constituents, the soul-sold wizards, figured him for useless to them and dropped out of contact. (He can't really blame them. They presumably have their own things they want to spend their remaining untortured years on that aren't writing to Aniol, who was never more than a convenient representative to them.) Aniol could send an adventuring party into the forest and demand a string of ettercaps and pitch them on the notion of going to Hell and they could unanimously approve of the concept, and he wouldn't have a way to find out if they'd make an acceptable trade.
Maybe he'd try more creatively if he thought they would be an acceptable trade, but - he's tried this before. Devils love it when you bring them somebody you'd like to damn in your place and they get to laugh at you. They think it's so funny. Maybe they're even right.
He doesn't want to spend his remaining untortured years on that.
He doesn't want to spend his remaining untortured years on... anything he's currently doing.
The succession rules work out that, at least in his case, has to make his eldest boy the heir. Not his first choice, but maybe the proponents of strict primogeniture have a point; certainly he doesn't fondly remember any of the parts of his life where it was very salient how his father was choosing among his options. What with how Aniol's siblings kept defecting at alarming rates and some of them got caught doing it. He got to make the decision about whether to sell his soul - whether to be his dreadful father's reliable son, the son who'd stay put and do as he was told. Whether to take Juncosa and all the girls he could pull with power and Splendor and a dick that worked - or not to do that - and he made this decision while his sister was dangling, dead and desecrated, visible out the window.
All of Aniol's children are indifferent to him. He is privately and ferociously proud of this achievement.
Sometimes he thinks that sister might have gone to Heaven or something. For defecting so spectacularly, even if she didn't get away clean; at least she had time to kill herself before they could get her before a fourth-circle priest. That's about what he expects from everything he hears about how to be Good. It is Good to bravely spite Asmodeans, i.e. those with less bravery than yourself. It is Good to abandon whatever you were supposed to be doing to flee into Molthune even if it soon turns out you could be hunted down en route with two dogs and a mercenary ranger. Based on the examples he has observed, it is Good to, specifically, behave at all times in every respect as though you value Aniol Reixach's fate at nothing whatsoever, as though he is not your baby brother, as though he did not grow up with the same monster who also fathered you - which is why he tends to imagine her sailing off to the Summerlands. Three for three. Perhaps in the same moment that Aniol signed the dotted line, she was judged and sent up. It'd be of a piece.
Abadarans are allowed to want things. And if they won't spend a penny on them, they don't really want them, do they?
The Splendor came with a kind of clarity, when it kicked in. Not like Wisdom, not like he rethought all his life choices, though wouldn't that have been an ironic time for it? It just opened up - options. Some of those options overlapped with the options that opened up with the promise of the march when his father died, some of those options were the same ones that came with the dick that worked. Some of them were their own thing.
If a peasant calls him Conde because he doesn't know what a marquis is, he's certainly supposed to respond to the offense with whatever bloody retribution strikes his fancy, but the profane, seductive, lovely Splendor says:
What if actually that was hilarious?
And that's such a time savings. He can just decide that it's the funniest thing he's heard all week. This ridiculous peasant doesn't know what a marquis is! What can they be teaching in schools these days? He can forget all about following up on the insult if he makes it a joke. Maybe the peasant was trying to make him laugh, after all, for here he is, chuckling. It works on so many things, too. What if it were all comical nonsense?
Maybe his sister went to the Summerlands for her heroic deed of abandoning him to Hell. Maybe he was such an unsavvy purchaser when he was sixteen that he sold his soul for a county he didn't particularly want, anatomical functionality that got him into more trouble in the long run, and a sense of humor. Maybe there really was a fourth circle priest to hand, maybe that wasn't a bluff - and if there was one, then he was never going to get out of Hell either way, but he swiped some really quite nice goodies out of the deal doing it like so, and put off Hell for fully decades, only at the cost of everyone he ever meets in the interim thinking he's a moron.
What if that was hilarious?
He squares up his affairs, marries a daughter off to one of Narikopolus's boys, and abdicates. He leaves his wife behind to be the marquis's mother. They never got along so well that there's still any call to pretend. He takes a few of his men and a Gozrehn as a party, and he wanders around Juncosa, hunting monsters, selling books he's already read to lighten the load and then buying more to fill up the empty pack space and the empty hours. It's a fine way to pass the time. It'll do till a bulette or an orc or a dragon sends him to Hell. Maybe a few more years will do for his love of hunting what his last few years did to his libido, and then he'll be content to shut himself up safely in the lake house with books and only books, waiting till he comes due for a reincarnation. Maybe he'll be a woman next time. Wouldn't that be amusing? Maybe it'd void his contract, considering. He would be so tickled. He'd just die laughing and then the Arch-healer would have to bring him back all over again. If she can do that. Maybe reincarnation won't work on someone who's soul-sold.
He doesn't have to find out for the next couple decades. He's not that old.
It'd be so funny if it didn't work, though. If there's one thing that's definitely funny in all the world it's the fact that Aniol Reixach is going to go to Hell while his angel sister never finds out because she never checks because she doesn't give a shit, and his devil father never finds out because he's busy being on fire because he was a heinous fiend of a man even when he was alive, and his children never find out because they couldn't possibly care less about their stupid giggly father but they still all know without having to do any finding.
He's allowed to want something not to be funny for once but that doesn't mean anyone has to sell it to him.