The shortages have again created opportunities for resellers who claim they will have the tablet next week.

On eBay, for example, prices for a 16GB Wi-Fi third-generation iPad run as high as $1,200, a 140% markup over that model's list price of $499, while 64GB 4G tablets are priced as high as $2,799, or 238% above the $829 list price.

Apple will begin selling the new iPad in its retail stores, as well as other outlets such as Best Buy and Radio Shack, on Friday, March 16.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at , on or subscribe to . His email address is .

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