It depends on what it is. For a lightsaber, as cool as it is, I have no use for it; it would sit in a corner someplace. Maybe eventually I'll have a Star Wars themed room and it would make a nice edition, but for now, nope.
I have artwork that's pretty pricey. I'm guessing this one was about $150-$200 with the frame. Although I didn't buy it; it was a college graduation gift from my parents.
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And then these two were about $125 each (My parents bought me the one on the right in high school; I bought myself the one on the right a few years ago)
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But for me , I see the value in artwork. I have artwork that my parents bought me when I was little about 20 years ago that I still have hanging up. I can't say that about too many souvenirs.
I sometimes splurge on souvenirs, sometimes don't. I think I spent around $50 for souvenirs last trip total, on a limited edition shirt and a pair of sunglasses because mine were driving my crazy. Sometimes I spend that, sometimes I spend more. All depends.