Just a free bump for you...
For those unfamiliar with the Burris Signature XTR, and Burris Signature Zee - you are missing out.
Two things about these have made them my ONLY rings of choice:
1. Plastic inserts that eliminate damaging a scope, because they grip it better than lapped steel or metal rings. They conform to the scope.
2. A variety of inserts allows you to vary the cant of the scope up to 40 MOA...without the need of a canted rail.
Wish I had need of these. Best of luck on your sale.