I found a Bernina 910, which is a bit newer than yours on CL for only $100!! I was dismayed to find that it does not have the presser foot pressure adjustment, and I find it a little too tight. Even in modern Berninas, I had to pay $2399 for their "cheapest" (NOT) machine that has this feature. My 1893 Singer has it, but not a $1300 2013 Bernina.
Do you folks who have these older machines miss this adjustment?