My 1952 electric 128 sews a nice seam. It is a 3/4 size machine, but very heavy. The old Singers were meant to be serviced by their owners. Billy (lostn51) has tutorials on how to take a machine apart and clean it totally, but mine isn't dirty inside.
The price - it's a bargain if it's what you wanted. The prices of vintage machines jump all over the place. I paid $35 for mine last November with the machine in a bentwood case. They both need external cleaning, but are sound with no missing parts.
I'm getting too many machines. The family has chosen this one to sell as I haven't sewn with her yet. She isn't going anywhere because she is just too darn cute.
Will you post a picture of yours either here or in the vintage machine thread? I like to see Mamie's cousins.