After haggling done, set in toward the standard seyda neen stuff. Check and see if the axe is there, possibly chill on the lighthouse for a while and see if lil'elf-dude's swamp stump is still lootable (and if elf-dude's ring's missing! Discount, discount!), maybe check in with the census office and see if tax-dude is missing (though the last one has that potential combat thing going with it, hrm...) or if there's anything else around town that needs doing.
I'd personally be stripping the place to the ground already if I was playing (iirc, if you're really dedicated you can walk out of Seyda Neen with about 10k septims >_> Maybe it was seven or eight thousand, it's been a while.), but with RP and uncertainty and whatnot that's probably not quite an option. Plus, given the scenario, trader-dude would probably be somewhat suspicious if you started hawking dozens of pillows and silverware to him, I imagine. And you don't have that initial glut from stripping the census office via leniency abuse, ha.
... on the other hand... there are a couple of empty houses, iirc, and there tends to be alchemy ingredients in barrels and sacks and whatnot. Even if you don't actually take them, it might be a good chance to do a little comparison between appropriately harvested and what you did before.
I'm also kinda' curious all of a sudden about stuff like clean water and whatnot, ha. Just 'cause the natives drink it doesn't mean you can, and given the whole fantasy-land thing, it'd be a pretty sad (and hilarious) way to go to take a sip of water and die to some kind of arcane hyper-dysentery everyone else is naturally immune to.