Honesty Hour: A friend of yours has a desire to sell their old Pokémon cards and would be willing to give them to you for $30, you can see that there are some very valuable cards (worth around $500 in total) in their collection... what do you do?
If they have a collection I guess they must know the real value of it....right? Then if he still wants to sell them for that price ...I'll take them.
