Mom Needs a Microwave (6114 Excelsior Boulevard)

I am looking for a countertop microwave oven in good working condition. My mother uses meals on wheels and they deliver dinners that are to be heated. She does have a gas stove, but she has central tremors and neuropathy leading her to feel very afraid of using it for long periods of time. They are microwavable, but I cannot afford to buy one at the moment. Thank you!