It was mentioned in a post below ("57 Nomad) that the rareity of a kit (any kit) may preclude the building of said kit. "I might want to hold onto it" being questioned as to why. My answer, "till later". Untill I hone my skills, untill I decied how I want to build it. untill I do a little research on the kit or the actual car.
I think there can be many answers to that question. I have many kits I have "put aside" just to admire them, to look at them ocassionally. I think there can be more than one facet to this hobby. You just want to build kits? Fine, more power to you. I however enjoy the research, gathering of parts, information,kits,and yes, just collecting.
So if you must question WHY I might save a certain kit as opposed to build it the minute I get it home, you build your way I'll build, collect, ponder, enjoy, store,horde,open,cut parts from trees, play with, save for a rainy day. etc. etc.