Most if not all the "stockers" are out of credits or stopped playing ao long ago, so 40$ for a billion ain't bad if you think about it.
How many people in anarchy online can make billions of credits without exploiting glitching or what ever you want to call it, and sell em for 25$/1B feeling it was worth it?
If I was even remotely new to the game, I sure wouldn't go trying to grind off a billion or more for that matter, if I could buy it for 40 bucks, especially if you live in euro zone with the exchange rate for a dollar being what it is, and using common sense tells you that buying from credit selling "companies" is bad in any game with staff that actually monitors the virtual currency changing hands, since the sites might end up selling to hundreds of clients a week, and how that looks like to a gm.... well I don't think it takes much to realize what's going on, then again ao has few to no gm's left for such tasks, other than the rare annual sweep, if ever.
And on chinese sites price is over 40$ ... are their 1b better then mine?