Just checked, the more expensive ones are $50, the slightly cheaper ones $40, but that didn't include the cheapie TracPhone which is $20. Call it $50, that's 1200 phones, bought in two groups of 600 each. At $20 that would mean 3000 phones, in two groups of 1500 each. That would have to be a pretty big business, and then you'd buy them on a corporate account, and probably get them cheaper. OTOH, you could be using a prepaid credit card.
The thread has been dead for over a month.
What prompted you to post this so late?
Been on vacation and just get back?