Some of Hollywood's best animatronics are going to auction

If you're a movie buff who can't get enough of Hollywood's monsters, you might want to brace your wallet for impact. Famed special effects guru Rick Baker is auctioning over 400 items from his collection, including animatronics that were key to livening up aliens, apes and other creatures in big movies ranging from Gremlins 2 to the Men in Black series. The amount of technology involved might surprise you -- in many cases, what you saw on screen was just a small part of what was going on. The bidding doesn't start until the 29th, but we've rounded up some of the highlights in the gallery below if you can't wait to see what's up for grabs.