Check to make sure the little things work. When I bought mine, I was too excited to check the little things. For me it was the drivers seat buttons. Luckily, I still have 3/36000 warranty.
Make sure the TSB for the auto trans was done. There is no easy way of replacing fluid.
Make sure the spare tire in a can and the air pump are still there. Jack and lug wrench.
The special wrench. (what ever it is called) I don't have one and I am still figuring out how to replace it.
The mirror controls are important. They need to work properly.
CD player must work for the NAV system. Check it out.
My drivers head light was deteriorating from the UV. If that one has the same problem, see if they will replace it or polish it.
Check all the lights and controls. Inside and out.

Hope this helps...