not sure about the tires but they are going bye bye as soon as its feasable. i work for an auto service center so tires ar not going to be a problem. i still have not heard from the owner so im still looking at other options.
Another thing to keep in mind, if you go forward with this one, is to check the wheels (rims) as well. You don't want to end up with a cheap set of wheels that aren't rated properly for a 3/4 ton. FYI, stock-size tires (which I'm guessing you can look up easily) are 245/75/16 10 ply (E rating).
Good luck!