Fair Price For Mario Paint

[Cambot]

A co-worker is bringing in a few SNES games for me to buy from him. The games are:

Flintstones (loose w/ dust cover)
Doomsday Warrior (loose w/ dust cover)
Mario Paint (complete with box, mouse, mousepad, instruction manual)

What would you guys offer for the lot of three games?

[8-bitNesMan]

According to the guide, the combined value of all three is $30. With that in mind, I would offer him $20 and go from there.

[Kid Ice]

Please post price checks in the Antiques Roadshow thread stickied at the top of the buying and selling forum.