How much would sell this watch for?

[DialMforMummy]

I am considering selling a watch I paid £600 for to a friend of mine. I bought it 10 years ago. It has a few scratches (minor ones) on the bracelet but the face is totally pristine. How much do you reckon I could sell it for?

Depends on the brand? Does it have a guarantee anymore? Assuming it's top end high street, I'd say £200 ish.