Heads up.. sale ends 3/31/2017.. but Newegg has an ASRock rebate program going right now. The main good deal I see is the x99e-ITX/ac going for $209.99 AR. It's a great board, with support all the way up to a 22-core/44-thread Xeon E5-2699 V4.
Newegg rebate form:
http://images10.newegg.com/uploadfilesfornewegg/rebate/SH/ASRock10MIRsMar1Mar3117USCh9Z.pdf
All eligible ASRock boards in stock with $30 - $50 rebates (including workstation boards):
Mail-in Rebate, LGA 2011-v3, ASRock, Intel Motherboards, Motherboards, Components - Newegg.com
Newegg rebate form:
http://images10.newegg.com/uploadfilesfornewegg/rebate/SH/ASRock10MIRsMar1Mar3117USCh9Z.pdf
All eligible ASRock boards in stock with $30 - $50 rebates (including workstation boards):
Mail-in Rebate, LGA 2011-v3, ASRock, Intel Motherboards, Motherboards, Components - Newegg.com