I collect Olympic coins. Just wait a year or 2 after issue and the price of them will come down. I bought the 1980 150 and 100 Ruble sets in Proof for just a llttle over melt back when melt was under $400 for gold and platinum.
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
Now selling Copper pennies. 1.6x plus shipping. Limited amounts available.