I'm surprised K-Tel never released a "Best of Ronco" :)
The K-Tel records always looked like good vfm because you got so much music squeezed onto a single disc - probably not the best idea for sound quality, but to release them as double albums would have defeated their budget objective.
They followed on from the old "Top of the Pops" compilations, which didn't use original artists and were frankly dire, although the cover art was always something for dads and teenage boys... a sign of the times, like the Big D Peanuts displays you'd get in pubs where you'd find a scantily clad model lurking behind the bags :)
Sorry that was quite some thread drift.

