I have a Pfaff Performance 5.2. It is not computerized. I got it as the model was being discontinued and it had been returned to the store after less than 10 hours of use. Got it at half the original price. A good solid machine that has not given me any problems in four years of use. I chose this model because it had a larger harp. It has made a big difference in my ability to do my own quilting.
When your money is short, look for a gently used machine and one that can be serviced locally.