Kalept

Suppose i had some elvis vinyl, unreleased due to the record label/producers not being happy with the first recording. What would these be worth. They were sent to be melted down however some were saved, and didn’t have a Bside or anything printed on them. I imagine they’re probably one of a kind. There was either an error or element of the song they weren’t happy with so they were supposed to all be scrapped. Thanks