Condition: The board is in great condition, non-skid is still bone white and grippy. Garage kept year round. The only flaw is the rubber nose piece has disintegrated, but I have a lead on replacement from a shop in Maui. Also, one of the spring-loaded friction buttons on the side of the centerboard is fried. Neither of these affect performance.
It is a great light wind board, and I would not be surprised if there are persons who would like it for a SUP [great spring loaded retractable fin].
Location: Central Illinois.
I noticed a guy wanting to buy a complete rig on Craigslist in my town, and I would part with this for the right price. It's not a burden to store, and one of my sons would be happy to own it, so pricing is the key.
My guess on the Superlight is $150 to $250. A clamp-on, adjustable boom is worth about $20 to $40. Only $10 if not adjustable. A one piece mast has "0" value to most windsurfers or a $10-15 value to someone who lives on the shore, has a windsurfing trailer or wants to tie things to a vehicle roof. A 1986 dacron sail (unless it has a mylar backing) has a negative value for a beginner compared to the stability of the generations of sails since then. An experienced windsurfer who wants older, easier to rig sails (that describes one of my friends) might pay up to $30 for the sail.