500$ for a motherboard... yeahhh... no

I second that.
So for what the $450 the board you link costs, plus $50 for CPU and another $50 for memory, $550 total (low cost miner build components) you could build 3X the typical boards.
3X Biostar TB85 ($65 ea) $195
3x 1150 CPU Celeron ($50 ea) $150
3x DDR3 RAM ($50 ea) $150
For $495 you have 3 complete platforms for which to build three 6X gpu rigs for 18 GPUs total for less than the cost of one that will only support 7X. Resale value or not, you can see which option is the better value for trying to ROI on your rig.
With that said, I do like the idea of a list for cost efficient 1151 mobos that can be used for mining, as one day the supply of 1150 processors for sale will be drying up. It is already starting to get hard to find decent priced ones on New Egg.