Rarity (and desirability) of a slant six/ factory 4 speed?

There are 2 cast # slant 4 speed bells early A body not OD trans. Rare enough and not cheap. Sold one other day for $300 and that was fair OMHO.

Rare? I have a 62 2 door post Lancer, wife claims it so could not sell IF anyone wanted it. Rare dies not equal $$$$$$$ LOL