Third-party sellers are now selling Apple's new iPad on Amazon's website, but at least for now it's no "Big Deal." The lowest third-party price for the base 16GB wifi model, as I post this note, is about $125 higher than the price at which the same model is available in the Apple Store. Even if you add in $6.49 for shipping and subtract sales tax in a back of the envelope comparison with the price you would pay directly to Apple, you would still be out a hundred bucks or so. Nearly all of the third-party sellers offering iPads at prices between $600 and $1,000 are low-volume or "just launched" sellers, and they may be hoping for some arbitrage profit if Apple happens to run out of iPads.
However, I'll be watching closely to see if Amazon itself becomes an iPad seller, which I do expect to happen soon. Amazon has been very successful at selling the various iPod Touch models, usually at prices slightly lower than those available from Apple. Even if an Amazon offering of the iPad were to be priced at par with the Apple Store's offering, the combination of a sales tax differential and Amazon's no-hassle 30-day return policy could make it a better deal for many prospective buyers.
Meanwhile, the Amazon Store may already be the best place to shop for iPad accessories like these:
Targus Hughes Leather Portfolio Slipcase Designed for 9.7 Inch Apple iPad TES00701US (Brown) (left, $59.99)
Apple Wireless Keyboard - $69 - I've been using one with the iPad for a couple of days and loving it
13-Item Accessories Bundle for Apple iPad Tablet Wifi / 3G skin case, sleeve, earphone, screen protector, crystal case, FM transmitter, speaker, cable + more
Be.ez 100884 LA robe Allure Sleeve for New iPad (Red Kiss) (left, $29.99)
Apple iPad Car Charger (White)
Scratch Defense Neoprene Sleeve for the Apple iPad
Belkin F8N277tt Pleated Sleeve for iPad - Black
Marware Sport Grip Pro for iPad Black/Black (left, $34.99)
Macally MSUITPAD Silicon Protective Case for iPad
Shade Anti-glare Film for iPad
Hard Candy Cases Sleek Skin for Apple iPad - Orange
Marware Eco-Vue for iPad