Pretty much agree with Muskett above.
I bought a nicely refurbed Mk1 last year for £200. My other 2 were less money, but a little while back and also in lesser (but still good) condition.

To be honest I suspect anyone not in the know would probably think 240 was on the high side, but on the other hand, I would actively seek out a good Mk1 rather than buy a recent one.

You just need the right buyer.

Then in 12 months time you will regret getting rid of it...