Ddr3 motherboard for lga 1151

[Clutch_Noob]

Looking for cheap Ddr3 lga 1151 motherboards. I'm building a budget gaming pc for my cousin and snagged a i3 7100 for 70 dollars. However it seems like all the motherboards take ddr4, he already has the ddr3 ram. I saw a couple from China but they seem shady. Any recommendations?

 

[SchizTech]

These four do, though they're out of production (technically obsolete since 8th gen is incompatible).

Maybe one can be found on ebay

https://pcpartpicker.com/products/compare/asrock-motherboard-z170gamingk4d3,asus-motherboard-z170med3,asus-motherboard-z170pd3,gigabyte-motherboard-gaz170hd3ddr3/