There isn't a chance of replacing my stihls with anything... hell no.
However, that being said, I don't turn down free chainsaws in good working order either
Besides them I've a set of large and small poulans. Seems like a good idea to have a series of backup saws. They're also good for the groundies to work with before I let them touch my stihls. And, as Ekka says, they'd be good for use with palms!
If I can only get in the ballpark of $10 for them, but can save my stihls that much more wear and abuse... it's fine with me.