I have this CD, too. Had no idea it was scarce. Sales prices have jumped around on Discogs the past couple of years, but someone's selling one for $12 right now.
Went to the Buster Posey retirement celebration at Oracle Park today. Quite an event! Lots of guests from Bonds to Pence to Brian Wilson to Bochy to Bengie Molina and many others.
I like their first few albums a lot. I saw them in a club in 81 (their first US tour, I think) and then again in 84 at Radio City in NY. I sort of lost interest in them after that.