Where have all these dropped to this level repeatedly in the past month? Proof or GTFO with your crying.
I'm not going to bother to dig through all the threads for you but here's a quick sample since you're either new here and/or don't read the forums at least daily and want to be a dick about it (XB1 games have been discounted at BBY, Amazon, Walmart, and Newegg amongst others (if memory serves)):
Check out camelcamelcamel for price histories too:
There's more I can almost guarantee it, but that's a good enough sample for a few minutes worth of work.