Looks like it might be a nice £13k C3 if you put £10k into it.
I'd have much rather had the manual one that Tom Falconer was selling on Car and Classic, if staying in that price range, because it had been actively used and maintained and had some MOT test history.
This white auto one has never even been through an MOT test. I know it's exempt now, but that just means it could be hiding a whole load of potential issues. I'd want to establish how long it has been here, for one thing; the MOT test history only goes back to '05 online, so if it's been here for that long, or was even here before, it hasn't done much. And if it's fresh in, well, again, I'd be wary. Current owner's only had it for just over a year.
In short, tread carefully. I'd not consider looking at it, myself, based on what's presented. Infinitely better to buy a more expensive one that's sorted and enjoyable out of the box, as it'll cost a lot less, in the long run, on many fronts. But those are just my thoughts.