The "Approximate price for all cards [user] needs from you" function at the bottom of another user's profile is not always accurate. It seems to disregard the amount of each card they actually want. e.g. If you have 4 of a $0.25 card, and your partner wants 1 of them, it will show $1.00 as the approximate price. (I'm not sure if that's exactly what the bug is, but the total price is definitely not accurate in a lot of cases.)[/user]