I found these prices at the Wilson, NC location. Though this is probably YMMV, it might be worth checking out, especially if your local store has participated in past clearances. Just about every system aside from Wii/360/PS3 was represented.
From memory, these are some of the better deals:
PSP:
Smart Bomb - $7
Wipeout - $6
Lumines - $4
Death Jr. - $10
Lemmings - $10
(many more in the $10-15 range)
GBA:
Final Fantasy V - $20
Mario/Luigi Superstar Saga - $10
Gunstar SH - $10
Metal Slug Advance - $15
SMB3 - $20
DS:
Pokemon Mystery Dungeon: BRT(w/ bonus DVD) - $15
Feel The Magic - $5
GC:
Odama - $10
From memory, these are some of the better deals:
PSP:
Smart Bomb - $7
Wipeout - $6
Lumines - $4
Death Jr. - $10
Lemmings - $10
(many more in the $10-15 range)
GBA:
Final Fantasy V - $20
Mario/Luigi Superstar Saga - $10
Gunstar SH - $10
Metal Slug Advance - $15
SMB3 - $20
DS:
Pokemon Mystery Dungeon: BRT(w/ bonus DVD) - $15
Feel The Magic - $5
GC:
Odama - $10