Thanks Steve,
It looks like this guitar went for
£220 at auction in December, with the binding, neck reset & pickguard hack already done, so I'm not entirely sure what the current owner has done to it, especially to justify a £350 profit. I'm mostly a slide player so I'm not too scared by the high action, but I'd like a stable neck, at least to ensure it doesn't get any worse. I guess I was entranced at the idea of getting an old archtop for half of what the L50 I was looking at went for. And Gretschs are cooler.
I was already somewhat cautious based on his slightly sketchy English & the fact he suggested meeting up at a third party location, which is one of the reasons I thought it was worth posting on here to enquire.