I'm not a BP breeder or even really into the herp world. But as a general business rule. . .you lower the price until you find the price people ARE willing to pay. Let's say you make furniture and make a nice hutch and list it for $5000. Maybe people don't think your furniture is worth $5000, or you've priced yourself out of the local market, so nobody buys it. So you offer it for $4000. . .and so on until you find a buyer. If that price doesn't cover your time and expenses, maybe you stop producing, or maybe it's your stress-relieving hobby so you don't care about that, but if it does cover your expenses there's no reason to stop producing just because you didn't make a huge profit.
As for BPs specifically, as I see it, it doesn't cost any more to produce different morphs (besides the initial price of the parent snakes), so I don't see any reason for someone to stop breeding their favorite morph just because prices go down. Unless they get out of breeding altogether for financial reasons.
ETA: those are 2 of my favorite morphs too, so I'm kind of hoping the prices come down eventually.