There are a few members posting here that are being rude. That is not necessary to get your point known. Any forum must be checked by mods. for the total benefit of this community. I could say much more but then I would be rude which is not something I wish to do. Will we get people joining who just want to grasp at the opportunty to sell? The moderators will have to deal with them.
Do you mean there are a few posting in this thread that are being rude? I am not sure I understand what you are saying. I don't think anyone in this thread has been rude, but maybe you are talking about something outside of this thread but regarding this topic?
Will we get people joining who just want to grasp at the opportunty to sell? The moderators will have to deal with them.
You will only get those people if you allow it to happen. For the record, I am part of a dog forum where we have a breeding section, and the one time someone tried to sell puppies everyone had a good chuckle with a bit of this -->

and the thread was shut down.
I don't think there is any harm in someone privately contacting a breeder via pm if they are truly interested, but I agree that the breeding section should not be used for blatant advertisement and that can be made a rule. If people break the rules and list availability and prices and all that, then they can face the consequences other forum rule-breakers face. To be honest, the majority of members here probably would not take someone advertising seriously, and the thread can just be removed (or have the content regarding sale aspects deleted) for lurkers who may not know any better.
I think that if there are clear rules that no advertising is permitted, and those rules are enforced, then it will be a non-issue. At my dog forum (which has a ton of members and is very high traffic) we do not get breeders joining just to advertise their dogs, because if they are blatantly advertising they are typically not a responsible breeder, and any thread they create to try to sell pups will end up giving them more negative attention from the members pointing out everything they are doing wrong than it would potential customers.
ETA: Oh and also, some people who joined and planned to get a puppy opted to change breeders from the local BYB to a responsible one on the forum (discreetly, through pm, so no advertising). Having the breeding section helped them realize the breeder they planned to work with was not that responsible or knowledgeable, and so being able to find someone much more reputable through the forum helped dissuade them from supporting the bad breeder. It was also nice because the breeder they contacted privately is now good friends with them via the forum and has been a great source of information for this person through the process of acquiring, training and and competing with their new dog.
If people can see breeders here doing things ethically it might make them more critical and equipped to know what kind of breeder is a good one versus joe shmoe down the street or the parrot pedler two towns over.