Can someone beat mibby's price of $0?
The upgrade from version 9 to 10 was in name only.
I'm actually planning to WUP every plugin I have at some point only to be able to sell the stuff I don't use. The math may never work, so I don't know what I am going to do when it becomes just to cumbersome to use very old versions. For example, I think you need a different Waves Central for version 9 plugins, don't you?
I only use a small percentage of my Waves plugins, but I really really like those ones.