In my searching, I found out that new Legos cost $6.99 per 1/4 pound at Legoland which is $27.96 per pound which seems very high, almost the price of gold :-). On eBay, I've found many lots of bulk Lego bricks from various sets. Using the $28 per pound price, I started comparing bulk lots on a per pound basis (including shipping) and only bid up to about $4.50 per pound. I've seen some auctions go to several hundred dollars for less than 20 pounds of Lego bricks. These aren't new bricks and come from random lots. The pictures on the auctions don't really tell you what you're getting, so I'm really confused as to why people keep driving up the price. For now, I've purchase a total of 21 pounds of Legos (in addition to the 10 or so pounds I bought a few weeks ago). Hopefully this will let me build what I want.