Yep, I stash $ also. 10 here, 20 there. I save it up and use it in two different ways.
One is to just buy another knife. The other is to fudge on the price, ie. my CTII only cost $200. Recently I got some display cases. Mistake, then my wife saw most all of my knives all nicely displayed together. She had no idea of how many I had purchased. But I told her that they were just cheap Microtechs. I would feel guilty, but she spends more on clothes and shoes and more shoes. I guess I am just making things even. At least I can sell my collection if we ever need the $. But I am not spending the grocery money either. Sorry for rambling, but I am a strong beliver in having my $ stash. Could be spending it on worse things, but I am too old for that.
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Aloha