How much is this worth?

Well, im plannying on selling a couple of games on ebay. This is their prices right now but i want to see peoples opinions on if i should lower or raise them. If you are posting on this topic please give me a price for EACH game.

Mercenaries 2-----25$
Final Fantasy Crisis Core-----20$
Blazing Angels------13$
Banjo Kazooie Nuts and Bolts------25$

Crisis Core = $15

Blazing Angels = $10

"Crisis Core = $15

Blazing Angels = $10
"

I got a better idea:  keep Nuts and Bolts and then film the fire you make with the other three!  = D

ight, thatnks guys!