That's both saws for $250. So, yeah, $125 each. The 266 has a 32" bar, the 55 has 18".
Seems like a good deal, but again, I don't know these particular Husky models. What I could find is the 266 is about a 70cc saw, roughly the same size as a Stihl 044. The 51 sounds like the little bro' to...