I haven't. What do they pay? I know a couple guys that pay ~90% of spot. ... A LOT more than the people advertising they buy gold.
On the flip side. Any chance you could talk to you grandmother about it? If she bought it at a store for you, she probably paid an arm and a leg. You'd be better off to return it and take the cash!
I'm also on SCF as Eskimokissers.
Buying your silver/gold coins and jewelry (no stones).