cheapest lga 1151+ pcie 3.0 motherboard

Solution
http://www.newegg.com/Product/Product.aspx?Item=N82E16813132871&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

$36 after rebate
re·bate
noun
noun: rebate; plural noun: rebates
ˈrēˌbāt/

1.
a partial refund to someone who has paid too much money for tax, rent, or a utility

Basically, you pay whatever price Newegg has ($56 in this case, minus tax/shipping) and when you get the item you can fill out a form and provide some proof of purchase that will give you some money back (in this case $20).