Looking at it via the ad, it looks like a great deal. The ad even says all maintenance done at their dealer. Don't drag your feet or it will be gone quick. I would be on phone asking about rust and timing belt etc. then I would be booking flight to go get it if it pans out. I would be doing that if I didn't have a great one already....hmmm my wife loves mine....maybe I should look closer. My point is you will lose it if you don't move quickly.
By the pictures it appears to have about $5000 in extras already done to it. If it were me I would call him and ask if he can run it into shop and shoot some photos underneath when on hoist. However being a Texas rig it's probably pretty safe bet no rust. My guess is now that you posted it here and alerted others to it you will miss out by not jumping on it.