Up until the most recent Yamato 1/60 releases (VT-1, VE-1), I ended up buying two of every version. One to open and play with, one to keep MISB. I didn't start out with that intention, it just kind of worked out that way over time.
I've noticed (especially with the re-release of the Hikaru VF-1A and Roy VF-1S) a similar trend now with the Yamato 1/48 line. If this keeps up it's gonna break me. I don't resist the desire to be a 1/48 completist, but I can't do it X2. Part of me says "If you're not gonna open it, what the hell is the point?" But then my obsessive/compulsive side kicks in and reminds me how much pride of ownership swells when it comes to MISB goodness. I think I need professional help.