The most liquid products are usually widely recognized sovereign coins, standard private-mint rounds, and common bullion bars from reputable refiners. Examples include American Eagles, Canadian Maple Leafs, Britannias, Krugerrands, Philharmonics, and recognized gold or silver bars.

Liquidity depends on location. A coin popular in one country may sell more easily there than a foreign coin with lower local recognition. Taxes, dealer preferences, and product availability also influence liquidity.

Stackers should prioritize products that local dealers regularly buy and sell. A slightly lower-premium obscure item may not be the best deal if it receives a weaker bid when sold.