Not trying to knock your auction, but honestly, those things are junk. I bought about 15 of them last year when TRU clearanced them out originally, sold them all very quickly, but got about half of them returned. Their sound emulation is horrible, they flat out will not play some newer GBA games, and I'm pretty sure that they don't work with certain version gamecubes. Needless to say, don't be surprised if your buyer is not happy, especially since you say it is just as good as a gameboy player, which just isn't true, this is a far inferior product.