Hi,
As Pete points out there is lots of info in the threads he mentions, however to save time here is a summary.
The tune was issued on the Sussex album "Stay a While With Me" and as a single, the b side to "Scandal in Bedrock"
The album version is slightly longer than the 45.
There is a dodgy unlabeled 45 in existence which plays the Album version, many will claim this is a test pressing but I'm of the opinion that its a boot.
The single is essentially not that rare but its a keeper and as such doesn't appear for sale that often.I guess in todays market with the demand it would sell easily at around £100, although I'm sure many will claim its a £20 record.
JF