It's buyer confidence Jon, simple as...
You'll need to contact the seller via the cart on the bay
If your contact is fast on the uptake signs are good to proceed with the sale
http://cgi.ebay.com/Neo-Geo-AES-VIE...12654QQcategoryZ62053QQtcZphotoQQcmdZViewItem
No seller however much time they have spread around the net
will pass up on questions if a sale is on the cards (or should)
Your seller is state side... This is good.
It's a store mate, get him to describe the cart in detail to your
spec... Price is subjective but for the version a specific post here could beat that.
If your seller can't or wont sent acceptable email pics of the carts
condition your flying blind mate.
EDIT: 64K... Leave it mate, let him take the shot.