I don't know about new pricing, you'd have to call a dealer.
There may have been an issue with the transom on the early boats. You might want to do a little research on that issue.
viewtopic.php?f=23&t=14565&hilit=transomOtherwise, there is really nothing about these boats that would deteriorate over time if it was stored indoors. The polyethylene hull will not degrade and neither will the sail, tramp, mast, etc. The only exception would be if the hull sat on rollers for a long time, the bottom may start to deform somewhat. But that would be easy to check.
sm