I have one brand-spanking new RT660 sitting around that I don't need or want. I bought it in March of this year as a spare for use during my race school since I wasn't ready to splurge on slicks, but now I have slicks and new wheels, so I don't need this one. It still has the sticker on it, but it has been mounted to my Audi's wheel. I can dismount it and have it ready for somebody who needs it. It would be $160 new from Tire Rack right now (since the RT660+ just came out), so how about something well under that?
The other four are available, too, and they've been run on the track quite a bit, so they look like snot, but they've probably got plenty of service life left in them. They're a bit older--maybe two years. Same size.
I'm open to offers. If somebody wants all five Audi wheels, that would be cool too.
They're these wheels (and tires).