Obviously, check for rusting in the water pan, and around the edges and in the bottom section. I wouldn't personally worry about the charcoal grate too much, pretty cheap to replace and they all burn up eventually. If it's slightly out of round, no bfd, easy to "hug" it back into shape. Truthfully, they're pretty bullet proof, and parts are easy to come by. The pic looks like it's in pretty good shape. You'll probably start changing things with mods anyway, so if it's structurally sound and the price is right, go for it. Hope this helps.