$90 is a good bargain for a nice sewing machine. I hope you did a search for onlines parts. The repair shop wanted $110 for a foot pedal and cord for my machine. I found it online for $34.99 at a wholesale sewing parts store. The repairman said he had to order it from the company that's why it cost more.
I have an app on my phone that scans the bar code of an item and then lists stores in the area that have the same item and the price. If the store won't match the lowest price I go buy it at the other store. This has saved me more then the cost of the phone and many times the phone bill each month. I don't have to clip coupons for JoAnns, Hobby Lobby or other stores, they are on the phone to be scanned when I need them.