"Oh, yes there is an exception. If an old microwave has no turntable, forget it, those ones are hopeless and a food poisoning risk. "

The turntable is actually a cheap way out of real engineering. Microwaves without them "stir" the waves with a reflector at the top which is motor driven, usually off the fan and some of them just use the air flow to blow them into turning.

Now if you have a microwave with both, there's a good one and I believe that's what we have here. Remember that $ 150 was wholesale because I worked there, AND I was told it was a special price at that. he bought a bunch of them and most went to friends and family. The only thing more expensive in table ovens was a convection microwave which requires a 30 amp dedicated circuit, but could cook a turkey in about a half hour.