Quote:
Recently I read about Australian 1967 Swan Dollar, that actually wasn't struck for circulation, and due to limited mintage, it also became expensive and desired by the collectors coin.
Yes, it is a popular item, but since it was not an official government issue (it was a "private pattern", commissioned by a local coin magazine) it does not count as NCLT, since it was never "legal tender". It is included in the Australian coin catalogues purely for sentimental reasons.
As for the OP's question, it should perhaps be clarified: are you talking about an original issue price way above bullion value, or are you talking about current collector value way above original issue price? They are two different (and not always interlinked) factors.
A good example of the latter category of coins is the Redback dollar of Tuvalu. Issued by
Perth Mint back in 2006 for about $60, it now sells for $1500 or so. Its popularity surprised everyone, not least of all the
Perth Mint itself and the coin dealers who bought them in bulk.
Secondly, since we are discussing NCLT coins made from a variety of metals, are we talking "most expensive" in simple dollar amounts, or as a premium or percentage above bullion value or issue price? For sheer dollar amount, the gimmicky mega-coins put out by Perth, the
RCM etc will surely win, as they contain millions of dollars worth of gold, platinum or whatever. But their value above bullion value is zero.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis