Use code 10offacer. No CA tax.
This is one of the best 1440p 144hz IPS GSYNC monitors. $387 is also the cheapest a refurb has been. Refurbs have been hovering $450 or so on ebay, with stock very limited. New ones are $700+. 260 in stock as of this post.
Remember, there are two types of XB270s, BPRZ (IPS), and ABPRZ (TN). The TN one is significantly cheaper. This is the IPS version.