A rare vinyl test pressing of John Coltrane’s iconic album A Love Supreme is currently being sold on eBay.

The album, which was originally released in 1965 via Impulse! Records, is considered by many as the greatest albums of all time and went on to become Coltrane’s best-selling record.

Now, in a surprise find, the test pressing is being sold on eBay. According to the seller, he purchased the test pressing “a few years ago at Academy Records in NYC. Someone also pointed out that where it says Coltrane it looks like his signature. I am not real sure about that. He usually signed his full name. No idea who Ken Coltrane is.”

Elaborating, the seller was asked who sold him the record when he replied: “a guy whose thing is hunting through thrift stores, garage sales. We couldn’t find another copy to know how much to sell it for.”

The record is currently listed at $20,000, you can view the listing here.