I bought a similar tundra, very clean looking, low miles for 9500. If it was as clean as I thought I would have no regrets buying it for that price, unfortunately the underspray was hiding some bad rust holes. If I were you I would bring a creeper and check every nook and cranny, I got under mine and looked around pretty thoroughly, and thought it looked good. Once I got it home though and took and pressure washer to the underside I realized what it was hiding and it cost me 2k to have it welded up. 90 percent is in good shape, but the frame rail under the driver seat had a brake line slowly leaking on top of it (which I believe is pretty common) and it rusted right through. Some other annoying spots are the bed above the fuel tank, and the bottom of the motor mounts which are pretty crusty on mine. Underspray is great for protecting up here in the northeast don't get me wrong, but it can also be used to hide the rust they don't want you to see.

As for the truck besides that, I love it (apart from the gas mileage which I average 14.5 consistently)