My best blind buy was 10 or 20p for Herby Brown on Blue Ash, must have been about the time of issue as it was around 80/81, how it found it's way to Chapel Street market in London who knows? Took it home along with some other interesting looking labels, most turned out to be C&W etc. Thought HB was OK, stuck it in a box for 20 years, played it out a couple of times in the early 2ks to no interest & one day found it listed in Manships price guide. ££££
Also got a Tom Emmanual from the same shop for the same 10/20p price, lots of cheap Motown US stuff & other bits & pieces hmm what else was there? They had no listening facilites which was just as well as I doubt that I would have bought Herby Brown if I had heard it first