As others have said, you don't want to put these on your instrument. "No returns" on E-bay doesn't include defective products, and you would have a right to complain to Ebay if they don't accept the return.

To be honest, I've had very poor experiences with LaBella autoharp strings, even when they weren't rusty. I find them not very tightly wound, and not as many wound strings for the middle register notes - cheaply done. You'll probably have much better luck with Oscar Schmidt strings, which you can find at various places. Elderly Instruments has fairly good prices.

Just make sure when you buy them that you get the right kind - most people want the "B" model - with ball ends - rather than the "A" model, with loop ends. There are exceptions, however, especially for older 'harps.

Best of luck!

Dan