The Best Deal on the Brand New, Roomba 564 - For Pets is at Hammacher Schlemmer.
Hammacher.com has the Roomba 562 For Pets on sale for $369.95. Hammacher charges no sales tax except for deliveries to NY, OH, and IL, and standard shipping is free for a limited time if you enter the coupon code HSFREE in the box marked "Please enter the source code or special offer code." at checkout. This free shipping offer is available exclusively through RobotReviews.com.
The advantage of purchasing from Hammacher is that they offer a 100% Unconditional Lifetime Guarantee on everything that they sell. The Roomba normally comes with a 1 year standard warranty, but if you purchase it from Hammacher Schlemmer and you ever become dissatisfied with the Roomba for any reason, they will replace it or refund the entire purchase price, whichever you prefer!
Some other retailers may offer a very limited conditional warranty and call that a 'lifetime guarantee'. Read the fine print and don't get fooled! Hammacher is the ONLY retailer to offer a 100% unconditional lifetime guarantee, absolutely free of charge.
If you do not need the ability to schedule your Roomba to vacuum automatically on it's own, Hammacher also carries the Roomba 532 'for Pets' model with an Unconditional Lifetime Guarantee for only $319.95.