1. That is way to much for a Game Genie.
2. I have bought fromn that guy before, I wouldn't reccomend it. He doesn't package his stuff very well. I guarantee you that he will just slap a shipping label on the Game Genie box itself and that would be the end of it.
I bought a Sega Genesis model one A/V cable form him. He put the cable in a PSP UMD Blister Pack taped it up and shipped it. No box, no bubble mailer, and it took six weeks to arrive because it got lost.
AVOID THAT GUY.