I guess this could be one way for porn stars or producers to make some extra cash.

See if people are willing to pay $100 for a $10 pair of panties because they were worn by a porn star on the set.

http://www.lu-bricate.com/Main%20Menu.htm

Perhaps used sex toys would sell better.

Why not sell or rent out the whores themselves? I imagine fees for anal sex with Kami Andrews could also buy twenty minutes at a parking meter.