I was going to buy a new (MY2009) double cab, 4X4, TRD Sport for $27,500. I decided to check out ebay
before I pulled the trigger. There was a 2007 double cab, 4X4, TRD Sport with 12,000 miles on it for $22,000. I spoke to the owner and for the $5,500 difference, I figured it was worth a day off work and a $49 ticket to fly to Boston and a $20 cab ride to look at it. With 12,000 miles and the remaining factory warranty, I pretty much had made up my mind I was going to buy it unless it was clearly abused. When I got there, it drove fine and while there was little evidence that it was taken care of (by my standards) it wasn't abused. There were a few cosmetic issues the owner didn't tell me about that I was not happy with. I made him a take it or leave it offer of $21,000. He took it, I did about $400 of cosmetic repairs and I'm very pleased.
My point is there are a lot of good buys out there. I'm not sure $15K for a 100K+ mile Tacoma is one of them. I think you can do better. It takes a little work but I think it's worth it.