Originally Posted by zmojo

Hate to tell you this , but looking at the deal you made, it seems you may have over paid.

Wholesale price on your 2011 Z $26,500 and $29,000 trade in and the CTS-V is $31,500 wholesale and $36,500 trade in. So a better deal would have been your Z and $7000 -$7500.
When buying a used car you should never pay more than $1000 more than trade in price, because in most cases dealers never pay more than wholesale for a car, they took in trade.