Another Kindle Deficit!

Last week Amazon introduced a $139 Wi-Fi-only kindle and it’s already sold out—”Orders placed today are expected to ship on or before September 4th,” according to the site. This follows last week’s shortage on the $189 3G model, which remains out of stock.

But Amazon maintains its Kindle caginess as far as actual numbers are concerned.

“Naturally,” writes Sarah Weinman at Daily Finance, “the e-retailer didn’t give an indication of how many devices on pre-order it took to reach that sellout milestone.”