Hi, I have a microwave - Toshiba, small - mid size. It still works, and is fairly powerful, and has just recently had the keypad redone.
The only problem is a slight weird smell that comes when it works. If someone wants to work on it or pay the money to fix it, you'll have a cheap microwave.
There is at least one place on Kingsway that will do free estimates, so you will know ahead of time whether to spend the money or not.
The cost is you picking up the microwave, so someone please do - I'd hate to toss something that works to the garbage.