1. there is the AES...the home version and the MVS...the arcade version
2. i never played on the AES and i own and MVS cab and i love it...but they are basically the same thing except for different shaped carts, so if you dont have the room for an arcade cab pick up the home version
3. i paid $350 for a mint MVS, but you can expect to pay a lot more on eBay for one....as for home systems...i have seen BIN on eBay for $180 or less from Japan....but the shipping is a hell of a lot

expect to pay a good deal either way you go