Nos 3989354 valve springs with retainers and keepers
 

I picked up a complete set of NOS 3989354 valve springs with retainers in GM boxes also keepers. What motor or camshaft were they used with or on? What are they worth? I seen a set on ebay. But I don't always use Ebay as a correct answer.

3989354 spring
 

3989354 spring shows L88, ZL1 camshaft 2nd design triple spring.

http://www.gmpartswiki.com/getpage?pageid=88796