Online stores don't have them because they keep getting bought as soon as they show upReviewers may have been generally disappointed in the Bulldozer central processing units, but even with the outcry on the Internet, the chips are selling well.
Then again, Advanced Micro Devices never actually said that Bulldozer would smack Intel chips around.
Bulldozer always was described as something that would be at the level of Core i5, but people probably hyped it up more than they should because it was given the FX moniker.
Either way, the 8-core FX-8150 and FX-8120, FX-6100 and FX-4100 don't suffer from a lack of buyers.
Of course, getting sold out could be indicative that the inventories of such CPUs aren't all that big, but that doesn't take away from how the units are, at the end of the day, gone from shops and retailers.
Meanwhile, AMD Stopped Shipping 45nm Phenom II and Athlon II CPUs, so look for one quick if you like them better.