The Touchtronic I gave to my mother in law 35 years ago is still working fine. I gave it to a friend. The 2010 that I got as a replacement was a wonderful machine and I just donated it. Still works great and the bobbin winder while in place was a joy. I would not pay much for any of them in today's market.
I upgraded to a Bernina 440 for the quilting regulator and some of the features.
My repairman said so long as the plastic gears dont break, the Singers are good machines. Even if they break, it was $150 to replace all of them. If you do go that route, make sure that all are replaced.