Both the Xbox 360 and PS4 standard versions of Saints Row 4 are down to $50 at GameStop now (matching the PC version's price), either online or in store. If you want to snag a used copy, that'll be $45. Dubstep gun not included.
We thoroughly enjoyed our time with Saints Row 4 when the game launched last month. It's an experience our review lauded for its "inventive, hilariously unexpected examples of truly inspired game design."