I've been checking out diff makes & mods of O/U shotguns, 20ga in particular. I see lots of ads for Ruger's O/U Red Label line, but hardly see 'em used ones for sale.

Are they scarce because A. nobody shoots 'em, or B. nobody wants to get rid of 'em?
Any experience? How do they compare to Citori or Superposed?

Last week I found a place with NIB Ruger's for sale, and the price is kinda making them interesting enough to maybe check out.