I don't see any comments here that say anyone plans to euthanize snakes because they have a low dollar value. It's not our fault you lack the ability to use logic to understand something that is otherwise taboo.
I don't see a huge difference between selling a hatchling to Timmy the Toddler's mom from Craigslist who will kill the snake from poor care within 6 months and euthanizing it. The only difference I'm finding is that one is humane and the other is slow, painful, and tragic with a chance it turns out well for the snake. The other difference is the monetary gain from the sale. You're simply taking the blood off your hands by saying 'welllllllll Timmy's mom might find BP.net and take this seriously and provide a good home.' It's a risk everyone takes (do you find that immoral?) when they sell a snake, we're just more likely to take that risk for money than not. That's not heartless to me, it's realistic and economical.
Again, I don't have plans to do this but I can logic beyond my own personal beliefs.