Trailtrimmer
ArboristSite Operative
Those prices in the first post are 20% off retail. Your stihl dealer must really like you a lot to offer that kind of deal. If I was faced with your decision, I'd buy a new MS261 with 16" blade .325" chain. Use it as your go to saw, then pickup a MS440 or MS460 with 25" blade 3/8 chain as your project saw.
Yeah, I can't believe that price, I'd never see it around here. I'd do the 261 for a new Stihl as well, probably rock a 18" bar though.
If I were buying used, I'd skip the Stihl and go for the 357xp nmurph is selling in the auction area. $330 for a muff modded and slightly refreshed 60cc pro Husky hard to beat.