I used to smoke but jacked it in ages ago.

When I smoked, I bought a solid titanium zippo because, hey, titanium’s cool right? It’s 2003 and has been used but otherwise in good condition.

I don’t need it anymore, and a quick google shows that they’re sought after but prices vary quite a bit.

Should I sell it on ebay, keep it and hope it gets more expensive, or sell it on a zippoworld.com type website (if one exists)?

A quick google reveals there are a large number of zippoworld.com type sites so I’d mooch around there. Don’t let the wiley zippo afficianado’s trick you out of it though. There’s a museum in America.