The two most-iconic rock themed pins from the 70s were both produced by Bally. They are highly-collectable as classic pinball machines and also as rock memorabilia. Their value will only continue to increase over time.
>Bally Kiss (1979) 17,000 units produced
>Bally Rolling Stones (1980) 5,700 units produced
There were a few other licensed rock themed pins from the 70s such as:
>Stern Nugent (1978)
>Bally Captain Fantastic & The Brown Dirt Cowboy (1976)
>Bally Wizard (1975)
You couldn't touch my Kiss or Rolling Stones for less than $4,000 (and even then I probably wouldn't sell them). Their worth goes beyond pinball as they were both made during the peak of each band's popularity.
They are both decent players too for their time.