I have many friends that show and are reputable breeders in and around the bay area. If you plan on doing it right and not buying from a back yard breeder or pet store, etc. then plan on paying about $1,200. - $1,500. for a quality, genetic health tested and guarenteed puppy in the bay area...
Young adults or retired Bostons often go for $800 - $1,200. but what a bargin since they are usually house broken and mannerly.
If you want to send me a private message I can give you email addresses of breeders to contact.
I have a litter right now and am in Redding which is about a 3 hour drive from the Bay area but they are spoken for. Be prepared to get on a waiting list.
We all know each other so we network a lot by sending people looking to those who may have something when we don't.
There are a few retired adults and and resuced Bostons on my site looking for homes as well. (or at least there will be!) I am updating today so tomorrow, go to
http://www.thewholedog.org/available.html and see some of the wonderful Bostons available.