Bacon & Associates in Annapolis
Bacon's has a great selection of used sails. Their rating system is tough and honest, so you really know what to expect. Last year I bought a used main from North for my C-27 rated "very good" for $375. It has worked out great. A new main from North would have cost $1,200. Bacon's has a great reputation (been around since 1956) and you get a 10 day inspection period. Their web page sucks and is not up to date (its in the testing stage), but you can call them and they will fax or mail you their list which they update monthly. Good Luck