Ok how about this take it somewhere like Dickies and put it on a commission sale, they will give you an inflated value but will deal with the “sales” for a fee be honest about what you want and if they get a suitable offer take it an move on with life.....
It’s a tender so put it for sale somewhere people need tenders.....ideally someone with a boat on a swing mooring or similar and garage with a desire to launch and recover every time they want to use the big boat.....
Or split it up and accept you may still have the hull in 10 years time the engine will sell as will the trailer if you were closer I have a mate who would be interested.... ( in fact may still be as I’ll be up that way in a few weeks.....)
£700 for engine, £300 for trailer that’s £1000 and you still have hull to sell or donate it to local sea scouts or similar......
Dickies Marine Services | Beneteau Power and Sail Dealers