I suppose it depends upon our memory , and which exact year , but I recall Mini's being closer to 2/3 . But same dynamic of relative significant price advantage .
It is firmly fixed in my mind that late '70s used , good condition AR were selling +/- $350 at gun shows ( in the era when show prices were a little better than at the respective brick & mortar ).
Pre FSA, I think I gave close to a grand for the SP1 in excellent condition. All original. No idea what they would go for now.