I have a 2006 Grand Touring MX-5 with the factory 17" wheels and tires. Tires have 10k highway miles on them and the wheels are like new. I prefer the look of the 16" wheel/tire combo. I'm willing to trade straight up as long as your wheels and tires are new or near new.
I'm in Trenton, MI 48183.
Bryan
bglimpse at yahoo.com