What are a set of bucket, electric seat back releases in mint condition worth????? wiring loom not included.

These are the only set I've seen ever, are they rare????

They are rare in the 1970 Chevelle. Only 633 cars came equipped with them.
I have a convert that has them from the factory.

I've seen one set on ebay about 2 years ago. If I recall, they went for something around $350 with the wiring harness.