obviously new Magna bikes are mostly big box store junk, but what is the story on this old Magna? I snagged it up at goodwill, because it was ready to ride at $15, but is it anything special? Was Magna a respectable bike during these days? Serial is "40304923" before paint and a "2" after paint: 1972 maybe? FYI, the baby seat in the background came on the bike.