Its a low boy cab which you can pick up for around $300.00 (aus)-$400.00 a 2.4 ghz pc and probally AVGA card $700.00 (approx) and the bids are up to $2247 (aus) So he is making over a thousand dollar profit because of the mame roms. That IMO is really wrong!
How would he go selling the arcadecab. (standard) with a pc sitting in it running windows. You would not get any where near the amount he is charging. I personally don't like the lowboy cabs. ( too generic and boring might be good for a small space ) and would not pay that amount for it. And it looks like its been covered in crepe paper.
