A cardboard box full of Lego is what remains. Luckily, you can buy it by the pound on E-Bay (I have seen 30 pounds go for about $40).
One of my first wins on ebay 11 years ago was 16 sets, mostly very large sets (kids often want sets, not bulk) for $200. They were brand new, and half the list price. I gave some every Christmas and birthday for the rest of their childhood.
;)