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<p>[QUOTE="iPen, post: 2498305, member: 69760"]Absolute and relative rarity definitely plays a role in my collecting, but it's in terms of prioritizing which ones to get first, as I'll be given more time to search for them as (if) they come up for sale (I don't like seeing recently sold listings of difficult to find coins at below average cost, since I could have prioritized the rarer coins first - especially if these coins just don't show up for months at a time). </p><p><br /></p><p>Anyway, I created a thread on here that looks at rarity in terms of the ratio of the total supply and the quantity demanded. In terms of absolute rarity, one can look at the mintage to the collector base population. In terms of relative rarity, one can look at the (# of listings available for sale + # of listings sold) / # of listings sold over a span of a few months or so (via eBay). For instance, the relative rarity ratio for a 2016 Isle of Man 1 Angel silver 1 oz is 1.199; while, the ratio is similar for a 1949 Mexico Onza at 1.1. Though they're not absolutely among the rarest, especially compared to many ancient coins and in "high grade", they're generally rarer than most modern and classic coins in terms of their market availability. In contrast, the 1942-P Walking Liberty Half Dollar has a ratio of 2.001 (recent market demand sales = number of offerings). Some coins go much higher in number (e.g. 4.0+).</p><p><br /></p><p>I like to buy coins with a low ratio closer to 1.0, which also has a low mintage figure, while the coin is offered at below average price at a given grade (I use MS-60 for classics, and MS/PR-69 for moderns). I get into more complex calculations that are done automatically on a spreadsheet.[/QUOTE]</p><p><br /></p>
[QUOTE="iPen, post: 2498305, member: 69760"]Absolute and relative rarity definitely plays a role in my collecting, but it's in terms of prioritizing which ones to get first, as I'll be given more time to search for them as (if) they come up for sale (I don't like seeing recently sold listings of difficult to find coins at below average cost, since I could have prioritized the rarer coins first - especially if these coins just don't show up for months at a time). Anyway, I created a thread on here that looks at rarity in terms of the ratio of the total supply and the quantity demanded. In terms of absolute rarity, one can look at the mintage to the collector base population. In terms of relative rarity, one can look at the (# of listings available for sale + # of listings sold) / # of listings sold over a span of a few months or so (via eBay). For instance, the relative rarity ratio for a 2016 Isle of Man 1 Angel silver 1 oz is 1.199; while, the ratio is similar for a 1949 Mexico Onza at 1.1. Though they're not absolutely among the rarest, especially compared to many ancient coins and in "high grade", they're generally rarer than most modern and classic coins in terms of their market availability. In contrast, the 1942-P Walking Liberty Half Dollar has a ratio of 2.001 (recent market demand sales = number of offerings). Some coins go much higher in number (e.g. 4.0+). I like to buy coins with a low ratio closer to 1.0, which also has a low mintage figure, while the coin is offered at below average price at a given grade (I use MS-60 for classics, and MS/PR-69 for moderns). I get into more complex calculations that are done automatically on a spreadsheet.[/QUOTE]
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Rarity: Absolute or Conditional?
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