Not a whole lot, but here's ~$20 off.
PCPartPicker part list / Price breakdown by merchant
I wouldn't get that REM 750GB drive though, it's fairly outdated now and only has a 32MB cache, a 2015 WD Blue should be faster.
Knocked ~$18 off the motherboard and ~$2 off the RAM.
Unless you particularly need silence, you don't need that aftermarket CPU cooler either.