Most reality shows and not real. This one is no different.
Wow, do you mean that the guys on Pawn Stars do not know everything about every obscure object that is brought into their shop? Also, they do not have a buddy that comes over at the drop of a hat to inspect the Picasso painting that someone came into to pawn(Monday nights show).
That painting/lithograph turned out to be one of two that Pablo created and was valued at $100k. They gave him a short term loan/pawn(I think $20k) with the artwork as collateral. He stated that he would definetly be back to get it by the end of the month.