YES, 6th gen consoles are cheap right now. Why? Because they're all refurbished, 70-80% of the machines still on the market today will break within a few years, it's Christmas time, and it's the imminent ridiculous drop in value that every system has before it can start being a classic. (5th gen is starting to pick up; GoodWill raised their price on N64's from $5 to $8 within the last year, and that's GoodWill; a good 2nd or 3rd gen system in working condition is worth almost what it cost new)
360's too. Not sure why. They're probably all the defective ones.