It looks like a good straight rig. It is getting harder to find these trucks that have not had someone molest them. If you are looking for an older model 40 for its vintage appeal then this may be the one. I would do some searches and get some background on whatever year and model truck you are looking at (search button above). Know what the dash should look like, know what the seats were and what they looked like, etc... The key is to find a truck that has all of the parts in good working order. If you are looking for a trail rig, then this one probably won't do, but if it's stock that you want it may be perfect.
The price does seem a little steep. But, you can always find cheap ones that you could sink a ton of dough in a week after buying it. If it is stock you want make sure the truck is complete as parts are getting harder to find and more expensive.
Decide if bone stock, trail rig, or mudder is what you want and make sure you do you homework on it first. If one passes you by before you make a decision it wasn't meant to be. (in my book anyway)
Good luck and let us know what else you find.