I got my 6th gen i7 computer during black Friday 2-3 years ago. 
800 dollars for i7 6700, 8 gb of ram, 1 tb of hard drive, and a gtx 970. 
did I get a good deal? I think so, ha!
I think it may have been 2015 black Friday, but it could have been 2016 black Friday... not sure... probably 2015. now that i think of it, I recall that gtx 10 series were already out, so maybe 2016 black friday