Elliot is 1.69 with .938 sv% in 23 games in St. Louis. 15W, 5L, and 5 shutouts.
The point in getting Elliott is that he's shown he can play very well at the NHL level, his salary is low, and at least at the moment he is behind another good young starting goalie. There's no comparison on any of those points with Bishop plain and simple. Bishop may someday turn into an NHL goalie; I'm guessing the Blues will call him up when they trade away either Elliott or Halak, but right now he's a possibly up and coming minor league goalie. Given that we already have a few of those ourselves I wouldn't personally be interested in trading for another.
Elliott spent several seasons in Ottawa behind a weak defense(comparable to the Devils) and his numbers were below average. St. Louis has a pretty solid defense which I'm sure has a lot more to do with Elliott's numbers at present. So what I was originally pointing out was that Brian Elliott is definitely not the single contributing factor to his success. As a matter of fact, his play in previous seasons points out the opposite.
It's like Tim Thomas. He was pretty much a sh*t goaltender until Boston started working at getting some good d personnel like Zdeno Chara. That isn't exclusive to his succes though as he also started practicing things like yoga and other regimens to improve his flexibility and play.
I would definitely pass on Elliott.