Though it is honorable that you want to buy the snake, doing so does nothing except let them know that they can keep them in these conditions and still make money. All that will happen is they will get more in and keep them exactly the same.

You are much better off complaining to the management/corporate and also filing a complaint with the local Animal control agency. If you keep doing this, AND stop buying things in the store, something might change. The only way to get big stores or, for that matter, any retail store, to change is to hit them where it matters. Unless they are losing money there is no reason for them to change.