“Keep-A-Knockin’ (But You Can’t Come In)” has been a song that’s been around since the 1920’s, recorded by Blues greats like Milton Brown and Louis Jordan, but it was Little Richard who made it a Rock N Roll classic. Rolling Stone Magazine includes it among its list of the 500 Greatest Songs of All Time. Released on Specialty Records in 1957, the single with its picture sleeve is worth up to $100.00 today.