ASUS Chromebook Flip C302CA-DH54 Intel® Core™ m5-6Y54 Processor - 12.5" HD Display - 4 GB RAM - 64 GB eMMC
Staples has this chromebook for $579.99, possibly $554.99 if you use the $25 off with Visa Checkout, plus tax with free shipping. link [staples.com]
Regular price is $649, Amazon currently has it discounted to $619.
Note that this is the C302 with the m5 processor. The version with the m3 processor is $449 on Amazon currently (but it has dropped to $429 before).