charsc400

Hey guys, I am in need of a Mass Airflow Sensor for my 1992 Lexus SC400. I was wondering what I should be wary of anything when buying a new one/ used one ie. is going aftermarket a bad call?, and other. The production date on the car is 11/91. I was told that the date is very specific, however it doesn't seem that way from the online options. The car's got 270,000 miles on it, so I just need to get her healthy again, no need to drop a grand on a sensor. Thanks, Charlie