£650? 😯
£50 maybe, as an interesting bit of memorabilia. Not as a bicycle; chances are it’ll be a bit worn out, and although you could probably fix it up fairly easily, it’ll be a lot of work and it’ll only ever be a very heavy, slow inefficient bike. It’s advertised as being in ‘very good condition’, which it clearly isn’t. It’s been neglected and ignored for decades.
I see a lot of bikes like this being offered for large sums; truth is there’s loads of them out there, not many are al that rare, and anyway even rare vintage bikes of that sort of age aren’t very ‘valuable’ economically. I’ve seen pristine 60s/70s Colnago racers go for just £200-300, and even ones formerly raced in the TdF don’t go for huge sums. £650 is just ridiculous.