The more I look at this thing, the more intrigued I get. The pictures and description seem to point to it being a proper GBA hardware clone (albeit a shoddy one), with the same extention ports, speaker in the proper position, and even a modified copy of the orignal GBA's back sticker proclaiming "MODEL NO. AGS-001", "©2002 Nintendo". "it has built-in games, also support card catridge. Classic games like Super Mari, Tank, will make you recall your fun
once." Once, and only once?

The cartridge slot
looks like it takes GBA cartridges, and most devices that play those 77777/99999-in-one have at least one of those cartidges included, and show it in the example pictures. For $2.18
more you could get one of those (
GB Station Light 2). Perhaps this clone is cheaper because the screen isn't backlit?
What's really troubling is if you scroll down to the discussion section, you see this:
Hi, we support to download advance gameboy game for customer if pay extra extra 7USD. After you pay you can contact our service department sales@chinabuye.com
After we receive your request we will do it for you as soon as we can(*^__^*)
tl;dr =
ChinaBuye wants to sell you GBA roms. This raises another question; how would you even play downloaded games on this? There is no USB port (or GBA to USB cable included), nor does it come with a flash cart...
Nice marketing ploy with the Mario 64 screenshots though, can't help but smile when I see such blatant lying.
Hey, the A320 can play God of War: http://www.chinabuye.com/a320-2-8inch-lcd-gameboy-mp3-video-player-fm-digital-multimedia-player-white
To be fair, that's actually one of the example pictures that comes with an A320 (it was on the one I bought from DX).