When you can buy a brand new fancy stitching machine on sale for really cheap, our vintage machines are less appealing. And if you aren't trained or willing to learn how to thoroughly oil and clean a beastie and ( gasp) maybe replace a part of two, you could send a lot of money to a repair shop. If you can find a shop who won't turn you away at the door.
I remember going to a fancy local Bernina show room. I instantly got a cool reception (because I am male?) I asked for bobbins for whatever model I was tinkering with that day. "Bernina didn't make that." hmm lf,"Yes they did, it is an old steel machine" They looked at me in disbelief that anyone would want to use such a thing. then one finally got up from her chair and looked on her 'puter screen. "No we don't have those."
I know they don't live to serve VSM fans, but you would think that anyone who sews might need a newer machine some day. Not the way I treated customers when I was in retail. I wasn't sorry to see the shop go out of business.