A buddy who owns a tree service offered to sell me his 3-4 year old Stihl 660 for $600. He doesn't use is all that much and he takes real good care of his equipment. I feel like it's a fair deal, if I decide to go for it. My primary use for it would be milling with my Logosol Mill (currently using ProMac 1000). I picked up my a new 362 last fall and I've gained a certain appreciation for a pro saw, so the 660 is very enticing. I'm wondering how much use I would get out of the 660, other than milling. Is the 660 more of a specialty saw (like felling or bucking big stuff only) or do some of you use it as an all day saw?