As far as I know the saucepans are much rarer than the skillets, but the 2QT is the most common of the three sizes (with the 1QT the rarest), at least in my limited experience. But none are particularly valuable from a collectible perspective.
Funny this came up, though - Just last weekend I was on a hayride at a farm and saw an old rusty post-DISA 3QT BSR saucepan (with tabbed lid) being used as a prop in one of the scarecrow exhibits... so they're around...