He's not selling a a cab really, just a frame and the stuff on it.
"MAME System w/ ect ect..."
I think it's a pretty good idea actually, just a frame to hold your CPU, stick and monitor in the right places. Makes for a cool PC gaming rig.
That one is maybe a bit too... heavy duty looking. Still if it was a little more refined, it woud be a pretty neat, versatile game rack.
Better than that overpriced X-Arcade one anyhow.