Depends, really... if you're looking for a normal RTB, you're probably going to spend in the range of 100-125 shipping included. Some will charge a little less, others a little more... it's the same thing you see in the BP market. Trusted breeders with excellent stock will keep their prices a little higher.

Now, if you're looking for a hoggie, you're probably going to be spending a bit more... say, in the 150-200 range.

Pastels---which are clean boas, sometimes with some pink, orange, or red coloring---are also going to run a little more, depending on the grade of the pastel... on average, around 150-200 with nicer pastels running up to 400 sometimes.

It really depends on what you decide to get. Do some looking around Kingsnake... you'll get a good idea of the pricing there, and will witness some of the fluctuations I'm talking about.