So I'm trying to work out if to keep my boxes or not.

Largely I've only kept whole boxes for larger/more significant lines. The issue with this is that my line on what is a significant item has broadened, particularly with special editions, like YOTS Omega Supreme.

Alts, Masterpiece, and 3rd Party I will keep.

What should I do with my Commemerative/Spec Ed boxes - ie:

Movie 25th Anniversary Unicron
Anniversary Predaking
YOTS Omega Supreme
Reissue Piranhacon