You buy mechanised because it's an item that holds that fond memory.
When I had to clear out my old room from my parents house, I found a lot of junk. From fan goods, to stuff toys, to figures.
But I noticed a pattern, I like buying things, but they are all in the wrapping and mint condition.
I really wish someone would have told me to not buy so much useless things, but that's life isn't it. You buy/get what tickles your fancy.
After that day, I decide to use the items, if not, there's no point in buying it in the first place.
For example, I brought some Johnny's boy band file holders. It's nice because it has a photo of the members, but I shouldn't be worried about getting it dirty. I can always buy a new folder when I got back to Japan with a more updated picture.

So from now on, I'm going to hold off on buying things I don't need and if I buy it.. I gotta use it.