get both the ac adapter and battery pack for the gba..the battery pack is good for home use 4 long RPG games, while the battery pack is on the go..the battery pack i have is the interact one for 14.95 @ fry's.
r u trying to do the EB 4 for 1 trade in??if u is, good luck on finding cheap game boy games, since those old gameboy games r at least $10 a game..