It is. I have plenty of friends in Brockton. It's the regular bags by weight but, there's plenty of dealers that sell .25 bags only but, you get decent deals for buying 3 or 4 at a time. Most people sell shit right off of the 10 gram solid fingers but, quality is still really hit or miss. Back in the days of oxy I used to get all my pills there but, I've honestly never found a consistently good dope dealer out of Brockton so I take my business elsewhere unless I can't find anything else.
I'd call Brockton south shore definitely. There are some nice suburban parts but, there's plenty of grimey city spots too. Weymouth is a bigger city on the south shore but, it's pretty damn suburban for a city despite its size. Matter of fact it was a town up until fairly recently. Still though Weymouth buts right up to Quincy so it's got a sizeable drug scene as well.