I have a nice set of 69E throttle bodies/magstacks. I understand that they are a one year only bolt pattern. They can be used on all years, as a mating pair, but not mixed and matched with other stacks/bodies, etc. What are these worth in todays market?

PS. They are nice, but I'm holding out for a great set of 71E throttle bodies for my 71E.

Moderator..I placed this in the wrong forum. Move as required, please