This is labeled as a grey market item with a 1-year seller warranty. At the time of this post, ebay seller BigValueInc has a positive feedback rating of 99.2%.
B&H has the Canon 6D for $1699 (reg. $1899) with 2% rewards and free expedited shipping. Additionally, the 6D kit with EF 24-105mm f/4L IS USM lens is $2299 (reg. $2499).
The deals also include a free SanDisk Extreme 16GB SDHC card, Canon camera bag, Oben monopod and spare battery. Check them both out here at B&H Photo.
Canon USA has a sale on refurbished cameras, lenses and other gear now with tiered rebates, which provide $10 off $100 purchases, $50 off $250 purchases or $125 off purchases of $500 or more. The sale lasts through May 31. Add your camera or lens to your cart to see the discounts applied. Check it out here at Canon USA.
Also, Canon USA now provides a 1-year warranty on all refurbished cameras purchased from Canon USA.