I'm a Bailey owner -- my machine has a 15" throat, which I find is plenty to do what I want. I got mine used for less than $1000; a new 15" is $1900, which is much more affordable than buying a true longarm. On the other hand, the Bailey doesn't have a lot of the bells and whistles that a true longarm would have; there's also the additional cost of buying the frame and the stitch regulator as well to keep in mind.
There are a couple of 13" machines (with frame) for sale on the baileyquiltingmachines yahoo group -- it's a good place to keep an eye out for people selling their used machines/setups, as well as to ask questions. I'm also happy to answer any questions as well, although I'm no expert.