just run the rims through a balancing machine. seeing it spin at high speed will show if the rims are warped. just make sure you're watching both sides while it's spinning.
i had an all stock 2010 tundra sr5 double cab 2wd and the price fell quick after a couple years. being 4x4 and all the parts i would think his original price would be pretty fair. they dont hold their value like a tacoma for some reason.
should update the price in the first post to reflect current price. i almost didnt look after the price till i seen it. lol
good luck in the sale, looks real nice for a "work truck"