Buying a C-22
I sail a 1979 C-22. I know people sailing C-22s both older and newer than mine. On the swing-keel boats you should verify that the bronze keel fitting and bolt are in good shape as well as the cable and winch. On an older boat you can probablly expect that the sails and standing and running rigging may be worn out and need to be replaced. I am still using the original sails and standing rigging, although I plan to replace them soon. These are minor issues if the rest of the boat is sound. Interior cushion covers can be worn out but are easy to replace if you can sew. As for which keel is better, that's a matter of where you sail really. If you're going to keep your boat in a slip and water depth is no issue, the keel version may be the better choice. If you're intending to trailer your boat and have to use a launching ramp regularly, or if you need to sail in shallow water, the swing keel may be the better choice. I've had boats with both types of keels and am perfectly happy with my current swing-keel boat. One advantage, usaully, of buying an older used boat is that it generally comes with a lot of extra gear, like anchors, cockpit cushions, radio, etc., saving you the cost of buying them. As long as the hull and deck are sound and there are no major leaks or other apparent damage I would not be afraid of buying an older C-22.