The largest Super Mario Lego set has received an extremely rare discount ahead of Prime Big Deal Days. Over at Amazon, you can get The Mighty Bowser for $234 instead of its usual $270. At face value, a $36 savings isn't a huge price cut, but The Mighty Bowser has almost always sold for full price since launching two years ago. Multiple other Bowser Lego sets are discounted, too. Dry Bowser's Castle, one of the biggest Lego Super Mario playsets, is on sale for a huge 30% discount; meanwhile...