So I vendor all my goods to one vendor so i can keep track of them later (And showcase my 9000+ iron daggers.) After 45+ hours of game-play I zone into the thieves guild to vendor my junk... and the vendor has only her default junk to sell... Did my game bug, or maybe finishing "Additional Jobs" and unlocking a new vendor reset her to default. I read multiple forums with no luck on this problem.

After 48 hours the vendor changes items

i guess your stuff is gone for ever :facepalm:

Well looks like I'm starting a new toon. So... lame...

Really? I sold a Whiterun Guard's helmet to the blacksmith in Solitude when I was about level 12. I'm level 28 now and he still has it for sale in his shop.

So in that case anyone know of any vendors that don't follow this 48 hour rule?

i sold a huge amount of stolen enchanted items to the girl of the thieves guild. now i realized how enchanting works and wanted to buy it back but now chance ...
at least my pickpocket skill is 100 right now. and it seems like the magic items on npcs dont respawn :/