PlayStation 4 (PS4) Consoles | PlayStation 4 (PS4) Slim + Pro Consoles - Walmart.com
Chart: Advantage Sony - PS4 Price Undercuts Xbox One by $100 | Statista
Chart: Rip-Off or Bargain - How Expensive Are PS4 and Xbox One Historically? | Statista
Xbox One or PS4 [PlayStation 4]: Which New Video Game Console Should You Buy? A Comparison of Xbox 1 and PS4 Price, Features, Specs, Games and Release Dates eBook by Eric Michael -