phew. Ok my turn.
What worries me is that I have not been in this hobby very long either, but since I joined it seems that the amount of people breeding and selling has gone off the chain and is completely unregulated or controlled as Cerat points out. People are breeding whatever they want in the hope of making big "easy bucks", and when they realise how much hard work it is to maintain the offspring, they do anything to get rid of all the slings and land up selling lower and lower just so people will buy and eventually give some away and maybe even send some to the freezer.
If every person out there is hoping to make bucks from breeding their tarantulas, very soon tarantulas will become like Bearded Dragon lizards, tons of people have them, and nobody wants them any more, you can't even give them away and they get left in a a corner of the garage with a cricket thrown in once a week. The final result is a completely saturated tarantula market with a collapsed economy, and only the very rare specimens will still be in demand. Profiteers will all slowly disappear and go find something else to skim cream from and eventually only the real deal T lovers, breeders and fanatics will be left to pick up the pieces of an hobby they helped build.
Unfortunately there is NOTHING that can be done about it, these are not cats and dogs. At least Cat & Dog breeders can control the breeding of their prime species by sterilizing the pups or kittens before they leave the kennel/cattery and prevents profiteering by unscrupulous breeders. Not quite possible with T's lol.
All we can ask or hope for from people that decide to breed, is that they ask fair prices and that the prices are market related, otherwise they themselves stand to lose out down the line, but as is very clear, you cannot stop anyone selling P.metallica for R50 if they REALLY wanted to.