Watches as an investment

[-Pete-]

I'd like a nice watch, and I guess used watches are a better investment than new ones?

Is a high-quality automatic watch a good investment, or at least relatively inflation-proof and easy to sell on? What do you need to prove it's authenticity?

Thanks.

[-Pete-]

I'm getting close to 0% on my savings and -x%/pa on my ISA and pension, so I thought I could enjoy a Rolex and not lose anything* if I sold it after a few years. Is this realistic? Is there a better brand?

• When I say anything, obviously a few £100 wouldn't hurt - I'd think of it as renting a watch.