Beach Camera through eBay is currently selling the Samsung Chromebook Pro and Chromebook Plus for $449 and $369.99 respectively after applying the code PRESDAY (prices before code/discount are $499 and $419.99 respectively).
These eBay codes are normally not very useful as sellers just raise their prices accordingly, but these are good prices for these Samsung Chromebook models. Links for each model below:
Samsung Chromebook Pro [ebay.com]
Samsung Chromebook Plus [ebay.com]