As the previous poster said, rust is an issue on these vehicles. But, I would argue that it can be a serious problem. I have two '03's, an SR5 V6 with 136k and a Limited V8 with 264k. I have had the SR5 since new, and last year while having the yearly NYS safety inspection done, the mechanic noted a lot of frame rust in the front. This past summer, I found that the front cross member, just under the radiator, had separated from the side frame rail on the right side because of rust. This cross member doesn't support anything other than the front of the skid plate under the engine, but I will be replacing it this spring. The SR5 also has rust issues on the rear hatch, under the upper part of the gasket surrounding the window and around the rear license plate area. The Limited, which I recently purchased from a friend who was the original owner, has less frame rust, but the rear hatch latch assy has been replaced two years ago from rust failure, and is badly rusted again.

If you do a search on frame rust and rear hatch rust, you will find many posts on these issues.

So, I would suggest that you check it carefully, especially the frame, for any possible rust through issues.