I have 4 old power projector heads and a couple of bases. Any idea of their value?
Depends largely on what they are… 35MM projectors are not fairing too well in terms of value because of digital and the economy.
If they are vintage (I.E earlier than 1955 or 1960) then your probably going to have to give them away.
Are you talking about Powers BRAND projectors? Their value would be determined by the condition they’re in. They would be very old! If you just have power projectors, meaning they run with a motor, it would depend on the brand and condition.