Evolved

You can use the cash AH without spending a dime
Using the cash AH is entirely optional. Players aren't forced by Blizzard to use it to trade for items. However, many of you fear that having a cash AH will make it so all the best items only sell for real money, thus in reality forcing people to spend money in order to get the best stuff. And while that's appears to be true on the surface, it isn't really. Here's why:

If you sell an item using one of your free weekly waivers, you can put up an item in the cash AH, sell it, and generate a positive e-balance without spending a single $. With that e-balance, you can then continue to put up items for sale and, using your initial e-balance, pay for the listing fees. Once you accumulate enough e-balance, you can then buy items for real money without having put in a single cent yourself. So you sell that legendary axe and legendary armor you found and use the generated e-balance to buy an awesome staff instead. The system doesn't lock anyone outside of acquiring the best items, what it does is allow people to spend money to get items faster. But it's still perfectly possible for anyone to use the cash AH.

And you won't even have to exchange legendaries for legandaries. If Blizzard has done its job properly and accomplished what was intended, which is to make gold a valuable resource, then people will want huge amounts of gold for their crafting, repair and vendor needs even if they only use the cash AH. And since gold can be traded on the AH, anyone will be able to sell gold for cash. Of course, the exchange rate between gold and cash is impossible to predict as of now, but in theory anyone will be able to make e-balance without spending any money. Provided there are some individuals out there who actually do put money into the system, some original e-balance has to be generated with actual money. But they will not have to be a majority.

In fact, the cash system will establish an exchange rate between gold and real money. The exchange rate will be an approximation since there won't be any mods available to track all auctions, but the market will probably reach a rough value. At that point, every piece of gold you make in the game will be worth an amount of $ equal to the exchange rate. This money cannot be taken from your e-balance (can't make e-balance into cash) but it can be used to buy items and blizzard products.

Well taking into account 6 active skills, all the rune combinations, and 3 passives we currently expect each class to have roughly 2,285,814,795,264 different build combinations. That’s not taking into account skill types for ‘ideal’ builds, but that’s always been a big part of the fun of experimenting (and longevity for Diablo II) - finding a build that shouldn’t work, and making it.