Rarity and desirability are not the same thing

Rarity describes how difficult an item is to find; desirability describes how strongly the market wants it. The two can overlap, but they are not synonyms.

A model produced in very small numbers may have a very narrow market. A much more common model may be heavily sought after and therefore more liquid.

When assessing a collectible item, ask: how many examples exist, how often do they appear for sale and how many buyers seem genuinely interested?

Do not use “rare” as a sufficient justification for any asking price.