After my sweet man tore it apart and determined it was a goner we opt for a new one.
A coffee pot with good maintenance lasting 30 years is really not that surprising if the design is simple. Money well invested even in the small purchases will take your dollar far.
Being frugal is to save up for the best you can afford to budget for, research and learn about your item on line. Utube and other sites offer user reviews. Avoid extra features when your able, it is most often the mother board computer parts that gives out. They are $$$ to replace. Fewer extras also mean no need to concern yourself with extended warrentees.