Quoted from DanQverymuch:Number produced / Number of Wants might be an interesting metric.
Examples:
TZ: 15235/1877 = 8.1 exist for every want
TAF: 21270/1773 = 12 exist for every want
R&M: 750/290 = 2.6 exist for every want
Fathom: 3500/560 = 6.25
CV: 2704/1057 = 2.56
My takeaway: no wonder R&M keeps going up in price! It rivals CV, which has been around 20 times longer!
I like the idea. I do think the number produced needs to be reduced by some factor each year, accounting for games being thrown off roofs, left to rot in barns, etc. This would only apply to games prior to 2010 or so (as no one would do the now).
Perhaps a way to approximate that is do to number owned by pinsiders / number wanted. The assumption is these are already scaled to show general availability.
Examples:
TZ: 2741 / 1877 = 1.46
TAF: 2080 / 1773 = 1.2
RM: 45+414 / 181+290 = 459/704 = 0.64