V&H drag racing cylinders

I've come into possession of a set of Vance & Hines drag racing cylinders. I believe they're for a KZ1000 but I haven't had time to go to the lockup and check the bore sizes, although I was told they're approximately 1200cc. From what I learned they're designed for use on an ethanol fuel drag bike. 

They're practically useless to me, I only acquired them through a little horse trading along with some other parts. Does anyone have any idea how much these may be worth? Planning on listing them for sale in an upcoming clear out but I don't know if they're even worth selling. 

Iv seen these go for $450 plus on Ebay especially on Oinks auctions. If you list them, list them internationally you will get better traction that way.