Bob I have a Stratos keel which I haven't advertised yet but have decided to sell. It's had very very little use (sadly), probably about a dozen outings in its life. It's a 2002 boat sail no. 363 but it's in very good condition because it has spent most of its life on dry land properly covered and cared for. I haven't given any thought to what I should sell it for, and I'd simply look at comparable boats for sale to gauge the right price. Trolley and trailer are included, the only "extra" that the boat has is the outboard bracket. Please let me know if you are still looking. I am in the Guildford area, as is the boat.