This kit has approximately 6,000 miles on the the clock. This is more than plenty of rear brake for any car. It has the oversize calipers and ultra thick rotors. It also has an internal parking brake that has worked great for me.
Jeg's lists it new for $1701.99. I'll let it go for $899.
http://www.jegs.com/i/Wilwood/950/140-9219-DK/10002/-1
This kit is used so normal wear and tear is to be expected. It's all in good working condition....