antique roadshow, they are not buying or selling just appraising and giving a history lesson on cool items. usually once per show thye have to tell somebody they have a fake piece of junk
pawn stars, they are a pawn shop you know going in your gonna get 50-75 of the value of something and at least they tell you if its junk. and Pawnstars seem to at elast tell you what the real value is, just your not getting there. your free to walk out and try to sell at auction
these American Picker guys seem to be a little bit of vultures. they mostly prey on old guys who have tons of junk in their yard/barn and give them very low ball offers. now, these old guys are likely to die with all their junk and the family will end up junking or yard saleing the difference.
just like pawn stars, they nver show them actually selling the stuff they buy just what they think its worth
i also like meteorite men and mantracker