It's just the original question of whether one year of exposure is significant. I suspect it is... the salt gets into the interior of the wire rigging and fittings and some residual will remain. It affects engine cooling systems, props/shafts and metal through-hulls as well.

However, most of us sail in salt water and know that the materials have a reasonable life span even in salt water. A well-maintained saltwater boat will have the same market value but the saltwater boat will have required more maintenance to be equal. It's not a reason to avoid a boat but with equal maintenance a salt water boat would show more wear than a fresh water boat.

No different than comparing cars exposed long-term to northern winter road salt or coastal salt air vs. cars from warmer inland/dry climates where they don't salt the roads. The southern and southwest cars' bodies and chassis last longer.