I owned a Model 150 throughout the 1980's. I wouldn't characterise it's performance as "dismal". The AM section was average for it's time. The best AM section I've owned was a Dynaco AF-6: Wow! it sounded like FM mono.
Anyway, I agree with Onhwy61; as long as you didn't hype AM performance you're in the clear.
Anyway, I agree with Onhwy61; as long as you didn't hype AM performance you're in the clear.