Im not in the market for it but figured I would throw it out there. Pretty sure the ad meant a ms660. Anywho here is the link. http://smd.craigslist.org/grd/4683955853.html
That could easily be a 066. You would have to see the number plate on the top to know if it was or wasn't. That is a good deal on that saw though. If it could be had for best offer of $500? Then it's a great deal!!
All the new Stihls have Flippy caps. But the 880 and 660 did not get Flippy caps. That's why it may be a 066. Can't tell by the caps. The new 661 now had flippies.
That's likely because of the 661 revamp? No? If they are gonna convert the 2nd largest saw? Might as well do the largest.
880 has had the flippy since they changed. They changed a lot of stuff on the 880 when they, went to a stainless muffler.