Talking of fixing appliances, I can see why a lot of un-handy people don't do it.
Our dishwasher stopped heating the water (here in the UK dishwashers and washing machines are only connected to the cold water supply. They heat whatever water is needed. I don't know if this is unusual on the grand scheme of things or not).
Anyway, we figured it was either the heating element or the thermostat that was the problem. The drying cycle was leaving dishes warm, so we figured the element was working, perhaps it was just a faulty thermostat that wasn't telling the heating element to come on.
It's a Bosch machine. 2003 model, always worked perfectly. We started taking it to bits. It wasn't easy. After much frustration and YouTubing, we got to the thermostat, and removed it. A replacement was not available.
I looked at how much a similar used Bosch machine would cost. I could get one locally for £30.
We eventually tracked down a used thermostat of the correct spec on ebay. £8. Ordered, put the machine back together so it wouldn't be in the way. Part arrived, took it all apart again, fitted it, works perfectly.
This took, in total... 3 hours? Trying to disassemble a machine that is clipped, not screwed together, trying to find a manual online (it came to us second hand) etc.
A new (used machine) would have only cost £22 more than the repair (so less than 3 times the cost of the repair). If we weren't handy people, I can totally see why you would just buy a new (although we would buy used) one, because the economies are similar - a repair guy would have charged £50 call out, then gone away to source the part (£20 new if he could get it?), then £50 to come back and fit it.. and a new machine would be under £360.
But I'm glad we are able to fix things like this, partly for the cost savings, but mainly for keeping it in circulation and out of landfill for longer (though much of the machine will be recycled, some can't be).