Values of MC18s seems to vary in my opinion. It depends on how fresh the engine is and the condition of the panels. Bridge Moto had a clean looking 2J for £3k with very low mileage, something like 3000-4000.
There's not much difference between a 2J & 4J other than wheels and paint, but Rothmans are probably the most popular colour scheme.
I would recon between £2500 - £3500
I wouldn't sell yet though. I would get a fresh battery & fuel and make some time to ride it _________________ Why do things simply when you can complicate them