If the guys can't get a mammoth 1929 Roadster safely down a decaying 100-year-old elevator they will be $20,000 in the hole. Plus, Mike uncovers a surprise when he hears hissing coming from beneath an out-of-control collection.

The guys explore a stash of ultra-rare motorcycle parts found behind a secret wall, and they find the ultimate aviation collectible - a propeller linked to Charles Lindbergh.