I either get mine new from National Tire & Wheel (did that once; great customer service), or off of craigslist, which was the case with my TrXus STS's. The guy had 'em on his Dodge for a week but decided to downsize (I guess some people think 39.5" tires are a bit big), so I picked up a complete set of 'em for $800; new they're $1100, and these had less than 100 miles on them.