Look over the frame real good and you might have to deal with splash guards obstructing the view. Timing belt replacement should be about at 90K, if it's more than 20 or 30k past that, I'd wonder what else was being put off. I'd be a stickler at that price, it doesn't look that far out, but I'd think 8 to 10k would be more the value unless it really is next to perfect. Put me in the under $5k buyer category, as I wouldn't likely be looking at this vehicle but think I can offer some input, if I'm way off continue as necessary...Do check OBD2 codes, pending, permanent and history. I would also want to see current misfire counts, as they may not be enough to set the check engine light on but any more than a couple random, infrequent at most could be a concern.
PCV valve and transmission fluid are a couple of more service items to verify. After-thought of buying my van was I should have just drove home with no PCV valve rather than the one that was in it. Bring a new PCV valve with if possible considering if your really are ready to buy the vehicle, you could also clean the one that's in it as an option. My previous van, I used the $6 red Harbor Freight vacuum pump and pulled 4 quarts from the transmission dipstick tube and put in 4 new quarts and it needed that, both Sienna's at ~200k and an hour drive to home.
Starter under the intake manifold would be a curiosity I could get over, just know what it takes for replacement. Was it used for towing? The large bed size would be a per-requisite too. Have you gone on Toyota.com and any other resources to check vehicle history?
Vehiclehistory.com is free and might be able to give locations as a 2008 from Mn would not likely be next to perfect when it comes to rust, I'd like to know it was brought up from the south fairly recently. $15k is a lot of money and you should get as much history and knowledge as you can before you go look because we all have probably done the purchase before fully realizing what we were getting.
These are obviously highly sought after, trust your instincts, might work out just fine if your comfortable with it. I did find a close comparison that has the carfax linked, slightly newer, a little higher cost $19k, but a southern history. I think I went on long enough for now...I really do want to help with advice and was awaiting the delivery of my new slightly used Innova Car Scan 5610 diagnostic code reader, good luck!
2010 Toyota Tundra 4WD Double Cab Standard Bed 5.7L