if you're getting into the paralysis trap, you don't really know what you need, based on that, I'd say you don't need it, and shouldn't buy it

I weigh in the money I'd spend, the time it might save me, whether I want it, whether I need it, what other people say (but only in aggregate, 10k x 4.5 stars > 1k x 5 stars, I had a better formula, but I can usually "eyeball" it now)

I do

want + save time ~= need need > want need > save time save time > want

as an example, I don't need a KVM switch, but it saves me having to disconnect and reconnect cables between my work laptop and own computer, so I got one

but for something like, a shirt, I don't care, I just get any of them, lowest price that's still got a decent rating