Is this a good deal for rallys?

[Malone34]

I'm in the market to purchase new wheels and tires for my project that desperately needs it. I came across a guy that's selling 4 275/60/15 on rallys with caps and rings and from the pics look really clean. He says tires have 95% tread and he's asking $600. My 72 short step is lowered I believe a 4/6 done by the PO and Im pretty sure the 275 would be too tall for the fronts but I figure I could get some 245s thrown on and have a set of the 275s to rotate on the back so total I'll be close to 900 for (almost) new shoes. Do I pull the trigger or see if I can talk the guy down some or scrap the idea completely?