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

Like said rarety and $$$ are not always related.
4 speeds are more fun for me even if the lowly slant. That slant bell is a good piece.
Want to be the fastest kid on the block, just pay the $$$$$ for modern muscle.
Want to drive around and chill, be cool... drive old Mopar iron! Slant 4 speed ranks right there!
Build as fast as ya want.