It’s funny, but I tend not to have a lot of duplicates in my collection unless they’re cheap. I have 2 MarkMont Classics but I didn’t pay for one of those, but beyond that my most expensive dupe is the Cypher and I only have that because one was in the mystery box last year.
That being said, I do like 2-tone yo-yos because it takes me back to the Proyo days where everything was “something and black”.