Sadly, the watches are only worth something if they sell. I've had quite a lot viewings on that £200 one but no interested buyers. And that set of Olympic watch, I think most go for around £200ish which works out around the same price per watch as I've sold the other single old Swatch watches at £20ish each.

The watch that has increased in value the most is probably my husband's Rolex Explorer 2, that's gone up 6x and is a keeper because he really likes it.