I've also heard they are easy to hack for mame. There are a few people selling them in CA area for a few hundred (600?) (and a few hundred shipping($300)). You can get them for about 50 bucks each if you buy 100+ from overseas... I'm suprise there aren't more people selling them around. But ever 6 months someone here tries to get people together.
But anyway, nice cabs. Clean look (if you like them). Monitors work both horizontally or vertically. You can find 19" versions with motor rotation.