When buying "used" (or the more fashionable term:  'pre-owned') jeans, beware of unscrupulous vendors who described them as "pre-owned but in great condition".  Recent experience taught me that one person's "great" condition is another's "fair/poor" condition.  Despite high feedback, it is not always indicative of the problems and misrepresentations some sellers make about their product.  Some people simply take the hit and never follow up thinking, oh well, live and learn.--Moreover, they don't want to give the offending seller the opportunity to ding them for negative feedback when they didn't do anything wrong!  DON'T let this happen to you.  Don't get stung by a bizzybee.  ASK questions about specifics:  WHAT does "great" condition mean?  Are these frayed?  Worn?  threadbare, etc. Better pictures etc. 

After all, after the end of the auction, you don't want to have paid for crap....

Good luck...