Bendix/Stromberg PD 12 R1

Good Day...While helping a friend organize the auction of hIs father's estate, I found 2 Bendix Stromberg PD 12 R1 Injection Carburetors. They seem to ba in excellent shape. I wonder how rare they are and how much they might be worth. While very cool, I have no need for them and would like to sell them. Any thoughts??

Geffen