For me, it is usually more of a building need. I usually buy two copies of the same kit and paint them both. I might not necessarily build both, but I paint both and then build the better looking one. It's a little insurance against having something go wrong. And I tend to build the same 10-15 kits over and over, so I like to keep plenty of copies of the kits I like, the 41 Willys for example. That's a great kit and I love to build it so I keep half a dozen on my shelves at all times. Then there are kits I rob parts from like the AMT 66 Nova, so I keep a few of those. Well, you get the point, the kits start gathering and filling the shelves. I do not collect. I build. So what I have are kits I intend to build. Having said that I now have over 300 kits and not enough lifetimes to build them all, but so it goes.