How can you really decide? One man's "junk" is another man's treasure.
I guess what i'm saying is, if it brings YOU joy, then i think it's not stupid.
I'm sure we all have bought things that we look at later and think "what the heck was i thinking?"
I bought a metal detector years ago. I had always wanted one since i was a little kid. So i bought a somewhat "cheap" one. About $200. I WAS gonna buy a more expensive one, but i was afraid it would be a waste. Well, i had a BLAST with it, and traded it in for a better one (plus another $100 or so) and i had a BLAST with it too! I found old coins up to about 8 inches deep in the ground. Found coins from the 1800's. Nothing super valuable, but when you bring a silver coin out of the ground, it shines like it was just dropped yesterday. Just A couple months ago, i sold it as of course you all know we needed money badly. I miss my machine, but made back pretty much what it had cost me. So i guess it can't be really considerd a waste.