I know, many of the records I picked up on record buying trips, for 5 cents sold for hundreds of dollars on Ebay. Back in the old days the black music was not played on the major white stations, that's probably why they became obscure. If you wanted to listen to them they were on the very end of the AM band. Being from the NJ/NY area, we had a nice selection of stations.
My rule of thumb: If the record is cheap and you’ve never seen it before, BUY IT! You get stuck with a lot of trash, but you also get some real gems.
There are plenty of white obscurities too. I always had a preference for rockabilly, hot country, and garage bands.
Back in those days, every kid (black or white) had a fantasy of being the next big star, and most of them never made it, but they certainly tried.
Back many moons ago I hid some records from my Sister because she played them all day long the guy sounded like a hound dog baying at the moon.
Our mother passed away and we cleaned out the old house and I remembered hiding them, They were some of Elvis Presley’s first records!