Behind The Counter Blues Week of May 13Memphis SlimChicago Blues--Beverly Records--$,' 14.99Jimmy & Erwin Helfer WalkerBlues And Boogie Woogie Piano--Beverly Records--$,' 14.99Percy MayfieldThe Voice Within--Beverly Records--$,' 14.99Memphis SlimMemphis Slim--Beverly Records--$,' 24.99All Behind the Counter Specials >This Week's Top 50--Beverly Records--$,' 99.98Neighborhood Favs--Beverly Records--$,' 35.98RSD Overstock--Beverly Records--$,' 24.99Indie Exclusives--Beverly Records--$,' 35.98Local Record Shops Only