Yep, I am too lazy as well to sharpen my own chains. So I own like six chains, when I am down to my last sharp one, I drop the other 5 off at a place in town. $20 bill later and I have a goodly supply for cutting trees off at the root again.
Every now and then Menards has a really good clearing of the rack sale on chains, I prefer this to sharpening my own. Probably because I can't figure out how to do it.