Pet kingdom has a lot of ball pythons right now, I believe one o their employees breed them but they always seem to have a mite problem.

South Bay exotics breeds all their ball pythons. They were at the San Diego show a while back. Their normals are kind of pricy at 45 or 50 bucks but I bought my friend a pinstripe from them and I would buy from them again.

Lll reptiles is kind of by mission valley, they have all kinds of balls, import sub adults for $25 and I think baby cbb babies are around $30 or so.

Those are the three reptile shops around San Diego that I know about =P