I am in need of a new set of mud tires for my 4x4 pickup and went shopping for a set today. My local Goodyear dealer wants $600 plus tax for a set of p255/70/r16 wrangler mt-r tires which includes mounting and balancing. The guy said that he would throw in 3-5K rotations to sweeten the deal. The guy said that it was an odd size and he needed to move the tires out of his warehouse. Is $600 a good deal for these tires?