I will take those calls on occasion. It is a good way to build a clientele.
I tell 'em that it is probably not worth fixing, but I'll be happy to look at it, and if I get it running again, I charge 'em 20 bucks. If it is something uneconomical, I let 'em know what a new one would cost, and bring it back to them. They always thank me, and often call me on the next job. If I've fixed it, they call me and tell their friends.
'Course, I'm not getting the $800 days like Wedgemann, nor have 17 calls in a day like some of the $ears guys.
I have the time to do this, and the need to build my business.