George, one quick example will help explain having a stash
When you are building a collection to a theme, you just have to get kits when you see them
Otherwise, as in my case, if you get to VA-63's plane, and don't have a stash,,,,,,,,you can't get the Emhar FJ-4 or Hasegawa F9F-8,,,,,,,they're OOP,,,,,,but, I have them in the stash, so I won't have to pay another guy his price to get them out of his stash,,,,,,,,same deal with decals,,,,,,when they're gone, they're really gone
even as it is, with a stash,,,,,,I'm 3 Cougars short and will have to pick them up wherever I run into them, even if they are expensive when I see them
just one example,,,,,resin parts are even worse
I hope this explains it somewhat
Rex