What's the cheapest thing you had bought that by the end of its usefulness made you say "wow, this was worth a lot more than what I've paid for!"
Mine... My Xbox 360 slim only costed 129 euro back in 2012 and to this day still work like brand new, you would think that the disc drive would stop working but no. Never had the need of open it or clean it's insides. Still great, I just don't use it anymore since I feel it's outdated and loading speeds are better nowadays.
Leatherman with matching bitset. Bought it on a whim 10 years ago and I use it constantly for lots of things. It wasn't my cheapest purchase, but damn has it gotten me out of a lot of difficult project situations where no proper toolbox was available. I've literally filled and repaired entire server racks with this thing.
Almost like having everything you need with the bit sets and ratchet driver capable or socket adapters its BIFL for sure. Warranty of 25 years. Service is top notch. I'm ordering a new one tonight lol. New wave plus with bit kit, extender, and looking for the ratchet driver but scalpers gonna scalp so I'm holding out.