The older the better if it meets your resolution standard, but these are pretty standard (and cheap used).  I use an old logitech c910 I bought 10 years ago that works great still when needed unless you really have to have a modern high-res one.  Otherwise I'd say stick with classics known/reported to work with linux.

I saw a dupe of mine at a goodwill like 6mo ago for 2 bucks I almost bought as a spare.  Ahh, the good old days of going places.

-mb