I have 7 machines. Mostly vintage singers with exception of my computerized quilt PFAFF. Each has there own features and strenghs (15 treadle, 15-91, 201-3, 285, FW).
I recenty learned to do basic repairs on them and it seems I always find them for around $20 or free. The art of sewing is lost on many! There is something about saving them that makes me feel good.
I recently purchased a Featherweight which I plan to use on rainy days in the RV while camping.