\n\n\n\nRare and ultra rare certified coins are not commodities. Each transaction consists of a willing buyer and seller. There is no limit to the upside potential when owning something that is irreplaceable. Thus, availability is ultimately more important than price, and the seller can be in an extremely powerful position as the buyer cannot simply go elsewhere to acquire the item. This benefit also assists in estate planning due to the flexibility one has in regards to valuation.