I have bought a few of those myself........
A pawn shop will come way down from asking price if you make a low ball cash offer. You can buy the ring and have the stone reset into a brand new setting for peanuts if you know where to shop. Nobody will ever know. I did that once and it was a huge savings.
I have a large round solitaire that is available for a very reasonable price. PM me if you are interested in detals.
-Mark.