Expensive!
http://en.wikipedia.org/wiki/Wagyu
From the link: "These different breeds produce beef that range from expensive (by any measure) to extremely expensive (about $500 USD per 150 grams of filet steak sold retail in Japan)." You can bet that Zero got the pricey stuff. I did a quick conversion: 150 grams = 5.3 ounces. So basically $100 per ounce.
But who cares when this guy is creating new entitlements in the trillions.
A hyper-expensive version of USDA prime in various cuts. The most recent Allen Brothers, a prime meat distributor located in Chicago, catalog yields these sample prices for Wagyu:
Strip. steaks: $75.00/#;
Filets: $116.60/#;
Ribeyes: $75.31/#.
IOW, the most expensive beef they could get.