I have a DeLonghi coffee grinder that served me faithfully for almost 20 years. It stopped working about two months back, I took it apart and found that an electrical component had come loose on the circuit board. Re-soldered it, and it's still grinding on just fine.
Aside from that repair, I've never done any maintenance on the thing, just thrown beans into the hopper and hit the power button. In today's world of planned obsolescence and cheap Chinese shite, it's quite surprising to me how well it's lasted.
When you consider that buying the beans is anywhere from half to two thirds of the cost of buying pre ground in bags (which I used to do 20+ years ago), and that I had a major caffeine addiction for the first dozen or so years that I owned it, it's done me proud.
DeLonghi still sell what looks to be the exact same model now, no surprise really - if it ain't broke, don't fix it. It's specifically the "KG79 Burr Coffee Grinder" on their website if anyone is looking for a good grinder.