Actually, it's Patek men's watches which hold their value the best among collectors....
I would agree with this as well. If you are smart and shop around you can actually resell a watch used for more than you paid new. My husband did this with a Patek and IWC a few years ago.
I think men's watches retain value better than woman's watches. I am not sure why this is, but perhaps women want new watches while men are willing to compromise? Also woman's watches are usually more trendy than men's.