From 9to5Toys.com:

iPads officially go on sale next week and AppleCare training started today but Apple reseller MacMall is the first US retailer advertising offering the iPad Pro and they’ve already marked prices down modestly $12/SKU.   MacMall, unlike Apple, takes Paypal and only collects sales tax in CA, NY, IL, WI, MN, CO, TN, NC and GA which can save a significant bit of change.

Note: All iPad Pros aren’t currently in stock but most ship immediately- 3 days

Apple has been showing off the iPad Pro for Education at the Dropbox conference and at Disney/Pixar and we expect reviews shortly. Apps like ProCreate, iTunes U and Adobe’s Photoshop have already been updated to work with the 12.9-inch tablet.