Microwave troubles

I'm really not a HUGE fan of micro waves, but we got a REALLY nice Panasonic Stainless Steel Microwave for our wedding from my Aunt And Uncle. It's a very nice microwave and about 1 1/2 years into it's life, it just stopped working. We're pretty cheap people and don't want to go to get an estimation that costs $55! Do any of you have any ideas of what we should do?