From my experience, there are a few tiers of these art rounds. There's the Franklin Mint collector sets and such - usually sold either in a...
There are a lot of collectors who have a grade floor for their collections, i.e. a grade, below which, they are not interested in a coin for their...
I haven't bought anything since the gold Merc severely disappointed me with its level of detail and strike quality.
Separate names with a comma.