I have had a fair number of CH BRNs and have always had success with them as far as health goes. Try and wait for a CH juvie to come along. They show up and a juvie is the best way to go, plus IMHO the juvies are way too cute. You can find a CH BRN for around 125.00ea - 200.00 . If you have a local show, that is where you see them for the best prices, plus you get to hand select one that way. On the other hand, it would be well worth waiting till PE has some in stock. They charge around 200 - 250 but as with most of there Monitors, they get first picks and have the best looking and well started one availble. Again, JMHO. I am sure others get in nice looking and health BRNs.
One quick word of caution (true with other Monitors as well) BRNs are usually really good feeders. Make sure you don't over feed them as a obesse BRN is not a good thing. I saw one that I brought up and then sold come in the shop a few weeks back and could have cried. It was WAY over weight. The guy said it is always hungry (true, but so what??) and that he only feeds him 5 or 6 adult mice a week (ONLY 5 or 6 adult mice?? ONLY 5 or 6????) Erghhhh! Rant ...rant.... rant. Done.
Good luck, I think they are a great Monitor to care for!
Shwing