It is worth a lot more than $125. This is a highly collectible Bernina. As long as it is in working condition with the foot pedal (these can be expensive to replace -- over $100) and the red case (also expensive), $125 would be a super excellent price.
One thing I don't see is an attachable table. Assuming the machine came with it, this can be pricey to replace (again, over $100). Being me, I'd still get the machine. It's a workhorse and highly reliable. The feet are fairly easy to acquire on eBay. Yes, a little on the pricey side, but they come up often.
Both the machine and case appear to be in very good cosmetic condition. That makes the machine more valuable also.
What parts are missing?