This is at a local branch of one of those buy/sell chains, where I can give it a good looking over to check visual condition.
Can't see any marks in a brief look.
Don't know how well the battery holds up ... is it user replaceable on these water resistant models?
Alternatives (same place) a Z for £149 unlocked, or a Z1 £149 EE locked (if anything else, I'd go for that an unlock, but I don't really like the extra size as it's not a comfortable grip as a phone.
Seen some new / boxed ebay, £229.95 "box opened only to check content, take pics" - do I trust ebay? Guy has 100%