How do you pay for a Box?

I'm curious, how exactly does one go about paying for a Box? Is there a specific payment method that's typically used? Or is it more flexible, allowing for various options? Are credit cards accepted? What about cryptocurrencies? I'm just trying to get a sense of the process and the different ways in which one can make the purchase. Is there a step-by-step guide or process that customers typically follow when it comes to paying for a Box?