A seller brings in an ancient hand cannon so old and so rare, even the experts struggle to determine its origin and history. Also a mystery is a tiny jewel-encrusted gold pencil that might just be Faberge. Meanwhile, Delfino struggles to revive a 90-year-old sour-sounding player piano and a woman brings in a dreary painting her aunt left her that she can't wait to get out of her house ... only to get a big surprise on auction day.

A collector brings in a pair of 19th-century ladies' pistols designed to be concealed in a hand muff, while another seller offers for auction an early-print Great Gatsby and a book signed by John Hancock. Then Jon, picking through a cluttered basement, manages to uncover a Venetian mirror that could turn out to be extremely valuable.

On the block: a headhunter's ax and a rare Vespa scooter with sidecar; meanwhile, Gallery 63 owner Paul Brown and his manager Cindy Shook have a bidding war of their own over a vintage Coke machine.

A seller brings in a snooker table he built for the Rolling Stones to use on tour, which an expert appraiser proclaims could sell at a sky-high price. A woman puts an amazing collection of rare African artifacts –- including an elephant mask, two iron throne chairs, and a terracotta honey pot -- up for auction, hoping for enough cash to renovate her kitchen. And Paul's dad Bob decides to sell a family of alien props that he took as trade for a pool table. As the auction approaches, he hopes to find out he got the better end of the bargain!

Owner Paul Brown and Gallery 63 team prepare for their next auction, which includes a Model A Ford and Lion King concept sketches. Cindy reminds the team of her picking prowess when she brings in a weekend find: a 1950s spy watch/recorder that still has historic voices on it.

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Auctions are a risky business, with seemingly worthless items often selling big while fabulous items fall flat -- and it's up to Cindy to teach Jon how to identify what will sell. This week, a man walks in with a 92-carat ruby necklace he's been keeping in a shoebox, another brings in a classic 1967 Triumph Chopper, hoping for enough cash to help his mother renovate her house, and a third presents an unopened case of presidential brother Billy Carter's Billy Beer that the expert says it's worthless, but Jon bets will sell.

Delfino's handyman skills are put to the test when picker Jon uncovers a classic "Love Meter" arcade game. Meanwhile, a monk brings in a 1637 prayer book that was brought to America during the Revolutionary War and used in the church attended by some of the Founding Fathers. It could bring in $5,000 to $7,000 if the right bidders are in the crowd on auction day, and all proceeds would benefit the homeless. Then, when a man brings in his grandfather's coat and sword, Paul must unravel their mysterious secret-society history in order to sell them.

The Gallery 63 crew struggles with manager Cindy Shook's new stress release, a drum set Jon brought in on a pick. Paul Brown takes rookie picker Jon Hammond to meet a client auctioning off his collection of sentimental Victorian furniture, including a settee and a piano, while a fossil-hunting couple from Montana bring in three rare dinosaur fossils, including a T.rex tooth.

Looking for funds to buy a new tour bus, a rock-a-billy musician cruises to Gallery 63 in a gleaming pink 1960 Cadillac. A wife unloads her husband's model tugboat, but it'll need some of Delfino's magic before it can be sold in working order. And a collector brings in historic Negro League baseball memorabilia that he hopes will help pay for a mission trip to the Ivory Coast.

Before auctioning off a hand mirror signed by Napoleon and a World War I Boy Scout war bonds poster, Gallery 63 owner Paul Brown calls in his antique-expert sister to shed some light on a mysterious cabinet, and picker Jon Hammond goes all out to impress his boss by helping assemble the upcoming auction's catalog.

Up on the block: a 1946 Willys Jeep restored by Richard Petty, a Rock-Ola jukebox, and a Ouija board that becomes the basis for a prank on Cindy.

Owner Paul Brown and Gallery 63 team prepare for their next auction, which includes a 1969 Oldsmobile 442, two chairs reportedly from a New Orleans cathouse, and a WWII Japanese rifle and sword still partially wrapped in the 60-year-old paper used to mail them home from the battlefield.!

Gallery 63 team prepare for their next auction, which includes Johnny Cash's autographed guitar, a trading knife made from a jawbone, and a 17th-century chest for treasures. Paul and manager Cindy initiate picker Jon in the much dreaded Speed Rug.

A vintage slot machine, a pinball machine used on Happy Days and a 1940s Whizzer motorized bicycle all go up for auction. Then Jon takes a World War II Soviet flag to a lab to authenticate its blood stain, and not even Paul can escape Cindy's Wall of Shame for people who don't pay their bills.

Office manager Cindy faces her fears and gets the ride of her life when she and Paul go up in a hot-air balloon that's up for auction, along with a woolly mammoth tusk and a giant, unset sapphire.

A letter signed by Rev. Martin Luther King and doll furniture created by famous folk artist Howard Finster go on the block; a woman brings in what she believes to be a shrunken head; and Paul enlists his mentor and father, Bob Brown, to help entice Paul's son Elijah to go into the family auction-house business.

With a historic Charles Lindbergh scrapbook and a collection of antique metal toys already on the block, Paul Brown also takes a gamble on a rare Wurlitzer band organ. But will it pay off?

One seller comes into Gallery 63 with a softball-sized meteorite, hoping to fetch enough money to take a second honeymoon to Paris, while another brings in a vampire-killing kit from the 1800s that could go for big bucks — if the right buyer attends the auction. Then Jon, the newest employee, is tasked with sifting through a jam-packed house to find "auction gold." He locates a signed copy of Gone with the Wind and a genuine Nazi handbook from World War II. But will experts confirm they're legit?

The Gallery 63 team auctions a vintage fire truck, a 19th-century copy of the Declaration of Independence and a Tiffany grandfather clock, as well as races to fix an antique concession wagon that breaks during offload.