anyone know the difference. i mean why is the 500 more expensive

I think someone's spamming their ebay auctions.

Maybe the 2nd one is made out of actual GOLD!?

There's a size difference with the more expensive one. It's also heavier, but I can't say if the extra dimension and weight is worth an extra hundred dollars

Just order a dj dao.
http://www.bemaniasc.com/eng/store/store_configure.php?proname=FP7
http://www.bemaniasc.com/eng/store/store_configure.php?proname=PEE
http://www.bemaniasc.com/eng/store/store_configure.php?proname=RES

The gold plated edition is ASC-sized, with an arcade sized turntable.  The 300 has a slightly smaller profile and slightly smaller turntable.

Those are more expensive though compared to DJ Daos.  If you're going to spend that kind of money, I recommend getting a DJ Dao controller instead.  I own one with sanwa buttons and it's fantastic.

The cheapest model is 180 (not including shipping or the more expensive sanwa switches), which is substantially cheaper than what's being show on that eBay page.

DJDAO Platinum Edition play 雪月è

Since when did we get another pantsu in this group Hahahah.