Personally I don't like the colour, but that's a personal choice and is down to you.
I would be concerned as to why the chain had snapped?? Was he just really unlucky with a dodgy chain or was it due to lack of maintenance, and if this is the case and he didn't bother lubing the chain the I would say he wouldn't bother with any other jobs, I personally would be worried about buying it without giving it a very thorough check over (very thorough indeed) and a test ride (make sure you learn how to check the oil so you can check that while you're there).
I got mine last year for £2k with about 20000 on the clock, VGC all round, and it's one of the faster 'red' ones. Bargains are out there, don't rush into anything you're unsure about because sods law you will see a better bargain 2 days after you hand the cash over.
Just one more thing, and I know this is telling you how to suck eggs, but don't forget to run a quick HPI check, they cost a fiver now and it saves buying an ex write off and having the insurance company offer you £300 value for it should the worst happen, I've been looking for a project bike to replace my Zephyr and out of the 3 I've HPI'd 2 have been written off in the past (none of the owners mentioned this when I asked, just said they hadn't done one).
Good luck with the hunt and keep posting your potential buys, it saves me working during the day
