Collector's Editions? Nope, don't have any of those.
I do have some GOTY, Gold, Deluxe and Special Editions of games, mind you. Also some compilations, re-releases, trilogy and dual-pack releases, but no CE's.
The closest thing I have to a "Collector's Edition" is the Might & Magic 6 Special Edition I have. It comes in a big box, with 2 CD's containing not only M&M6, but also M&M1-5 and even Swords Of Xeen. But that's not the real Collector's Edition, because there's also a Limited Edition of the same package, where the CDs have a hologram on the cover, plus some extra goodies IIRC.