The good news? You can pick one up for about $4 at Walmart. The bad news? The calories in a Tombstone cheese pizza are 1,400 for the whole pie, of which 560 are calories from fat. Or it's 350 calories per slice, if you cut it into four pieces. As far as nutrition (or lack thereof?) the entire pizza tops out at 2,640 mg of sodium, 160 mg of cholesterol, and has almost no antioxidant properties, as you can see from its very low ORAC.
Research Support, Non-U.S. Gov't: Carlsen MH, Halvorsen BL, Holte K, et al. Nutrition Journal NIH Jan 2010