What do you do with older sheets??

I have two sets of sheets (queen size) that we have used for a few years that, frankly, I'm tired of dealing with. One set has a dead elastic on the fitted sheet, the other is mismatched: king fitted, queen top.

Should I donate them? Toss them? We really don't need another "drop cloth for painting.". They are clean and in decent shape, they just have issues.