Estimating algorithm.

I think there should be some credence to how often a card sells.. or in that same algorithm how many of that card is in circulation? For example, you may have some common 1998 Donruss, junk card randomly sell for $1.00. But over 10 years that is the only sale. The Ludex estimate will be $1. or $0.50 - $1.50. But if somehow you were able to role in that there are 20m of this card in circulation, and one sale over 10 years.. should equate this to a (example)- $.05 card. Or a timing mechanism.. quick sale.. $.05 cents... if you can wait a year its $1. - Just spitballing.