I've committed to many machines off pictures. I've made a few "mistakes" but I've not backed out of any of them yet, as in no case was it the seller's fault in misrepresentation. Many don't have a clue what they have . . .
I'm post kids, so I consider some of it "entertainment" money. There have been a few times DH and I have tried out a new restaurant, spent more than $75 and decided it really was not worth the money.