In prime condition that might be worth £1000 or so. It's not a Sutcliffe (it's a bog-standard mid-60s President), and the neck reset is the least of its troubles.
It's obviously beyond a full restoration and will never be worth anything like £1000 but it could probably be brought back into playable condition for c.£100-ish (reglue the neck, replace the nut, ideally replace the unmatched tuner, sort out the wiring, new strings), so it should sell for well under £500.
Now watch the market prove me wrong ...