Blacklist was on sale recently for $40 and is back to that level again for all consoles — with the only change in this new sale price being that that the super-mega-deluxe+ version is $100 instead of $160. A bigger savings comes in the form of The Bureau: XCOM Declassified. On PC, you can get it for $20 on DVD, or you can have it on the 360 and PS3 for $30.
This poor game seems to be cursed, but if it interests you, this is the lowest price it’s been at yet. It will probably hover around that level on consoles for a while, but I can easily see it being a $10/15 deal on Black Friday for consoles, and being discounted to lower than that on PC during a Steam sale.