I doubled my money on a risky vintage fur buy that I definitely would not make today. Vintage fur is rough because people think it's worth more than it actually is. (Mine sold for around $150, and top end was probably $250-300 if I wanted to sit on it.) Then there's the issue of styling, which most of us (myself included) know little about (I just got lucky). Literally every fur shop I came across in my research offers restyling/repurposing services for dated vintage furs.
St. John knits, however, I will buy all day given my experience selling 5-6 pieces so far.