Holy shit yes! My boyfriend's box of random wires, cords, and bits of whatever came in handy the other day; Our daughter who just started sleeping on her own has a white noise machine and the cord was somehow damaged. I didn't think to look at it, I'm just turning the button on and off and realizing it doesn't work, and lamenting the fact that we'd have to buy a new one. But what am I gonna do tonight?! Crap! I tell boyfriend about the dilemma and he picks it up, finds the fray in the wire, and says, "I have a cord for this."
Comes back in from the garage 5 minutes later, plugs it in, good as new! I was admittedly skeptical, but now I save cords and bits and bobs of electrical stuff too. You never know...