Welcome to the forum. Just FYI, there are not just silver coins in the 30th anniversary set if you're going for a full set. There's 13 gold and a black coin, which brings the set up to 96 all in.
I have the full set in a custom frame, if you're interested... won't be cheap though as there are a few hard to get coins in there nowadays.
The singular gold coin at the bottom, is the very exclusive SDCC Indiana Jones coin..
Wanted - Boxed Lili Ledy Speeder Bike