That series is fantastic! As you said, nothing terribly rare there, but a great starter's compilation. If you're looking for an introduction to any of the artists featured in that series, they do a great job of featuring the essential cuts. One of the last independent music retailers in my town closed recently, and the very last CD I bought from there (after 30 years and tens of thousands of dollars spent) was the Sleepy LaBeef compilation from that series. As I said to the manager of the shop, "I can't believe this store is closing. Where the hell else am I gonna find Sleepy LaBeef?"
Not Best Buy-a-billy