How much should i sell UnID's for?

Title speaks for itself.

Lets say I found a... oh i dont know.... A rare smiting staff

Lets say I decide NOT to identify it but it IS max damage to say the least.

I hear people say they sell their stuff at 150k and its UNid, etc.

I want in on this game!

Infact what should UnIDs go for?

It depends a lot on what the item is. Requirement would affect it a little, whether it's max damage would affect it a lot, whether it's purple or gold matters, and what weapon type also matters.

A max damage gold unidentified sickle would probably sell for hundreds of k, but a max damage gold unidentified battlepick would probably be more than ten times less. A purple unidentified battlepick might be like a k, and if it's not max damage you're better off identifying it yourself and hope for a mod unlock.

I don't have much experience with trading unids so I might be off a little, but this can just give you a general idea.