I have a mainsail for a Columbia 26 that seems to have a good amount of life left in it. The only obvious defect is the bottom-most metal ring that attaches the sail track is rusted out and will need to be replaced. I'm no sail expert, but I think it's in very good shape otherwise. I attached a few pictures if that helps.
Asking $400. I'm located in southern MD (in Calvert County, about 20 minutes from Solomons Island and 50 minutes from Annapolis. Let me know if you'd like to come by and check it out.