The three "Golden Sisters" -- 82-year old Mary and 74-year-old twins Terry and Josie -- are at it again. After the ladies hear that one of Josie's clients from the salon made millions of dollars selling her antiques, they decide that between their collective junk, there has to be at least one piece of hidden treasure that's worth some money.

So, the Golden Sisters head to Terry's house in search of something valuable. That's when Josie discovers what may be an incredible artifact tucked away under Terry's bed.

"What is this thing?" asks Josie, pulling out a plaque holding a giant sword.

"Oh my god! I forgot I had it!" says Terry, before offering an explanation to the camera. "Our dead brother, Angelo, used to ask me to hold on to some 'hot' stuff, and I did it. Now that I said it out loud, it sounds illegal..."

Illegally obtained or not, Terry tells her sisters that Angelo had said the sword once belonged to 19th-century French Emperor Napoleon Bonaparte. Sure enough, Terry points out that Napoleon's name is engraved on a metal plate affixed to the plaque. "It's right here in black and white: sword de Napoleon," she says.

Eldest sister Mary is impressed... though it appears that her knowledge of history is a little fuzzy. "This sword belonged to Bonaparte-- Napoleon Bonaparte. I mean, he was king of Italy! In the medieval days!" says Mary, incorrect on both counts. "And my brother Angelo stole it. I think he stole it." On that count, Mary might actually be correct.

"If this is Napoleon's, Terry, this could be worth 10 million dollars," says Josie.

The hidden-treasure search continues on tonight's episode of "Golden Sisters," which airs Saturdays at 9 p.m. ET on OWN.

Earlier on HuffPost OWN: How To Find $1,230 In Your Dining Room

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  • Milk Glass Cake Stands

    Consider it a ripple effect of the cupcake craze: Pastel-hued or white glass pedestals for cakes and other baked goods are some of the most sought-after retro items hiding in your china cabinet. Milk glass, which is opaque, generally isn't as valuable as crystal, but if it has a well-known manufacturer's name on the bottom (look for Duncan, Fenton, L.E. Smith or Westmoreland), it could be worth anywhere from $50 to $400.

  • Vintage Tablecloths

    When it comes to table toppers, Marghab is the name that trumps all; it refers to linens that are handmade on the Portuguese island of Madeira. Tablecloths, placemats and napkins from the '60s with the Marghab name are always in demand; a recent set of 10 napkins attracted bids of more than $200 on eBay. Jim "Griff" Griffith, <a href="http://www.ebay.com/hp?_feedexp=0" target="_blank">eBay</a>'s senior manager of seller strategy, also says table linens from the Finnish design company Marimekko, known for its bright prints, are back in vogue.

  • Mad Men-esque Plates And Glasses

    Anything reminiscent of the late '50s-early '60s, along with all things midcentury modern, are at the top of the list for shoppers who are looking to stock their first apartments or homes, says Griffith. When it comes to dinnerware and glassware, pieces from Dorothy Thorpe (whose Roly Poly glasses with a silver rim are again popular, thanks to Don Draper), Russel Wright, Winfield, Red Wing, Style House, Thomas Rosenthal, Melmac and Fiestaware are in demand (for instance, a set of eight Dorothy Thorpe glasses goes for around $26). Even if you're trying to sell generic china or glassware, if it has that midcentury look (think Scandinavian simplicity), you'll find a buyer. It doesn't even have to be a full set: Lisa Conklin, public relations manager at <a href="http://www.replacements.com/" target="_blank">Replacements, Ltd.</a>, says people are not hung up on making sure all their glasses or plates coordinate; she's been seeing more customers than ever updating their tables by combining old and new patterns.

  • Mirrored Furniture

    Despite the waning popularity of formal dining rooms, mirrored buffet tables and sideboards (basically, furniture that has display space on top and a closed bottom) are in. <a href="http://www.elledecor.com/shopping/furniture/contemporary-mirrored-glass-furniture" target="_blank">Designers love pieces that have both mirrors and wood</a>; they play off each other and have a vintage quality -- even if they aren't more than a few years old (we found a new wood-and-mirror mini cupboard on eBay for $289).

  • Vintage Cocktail Shakers

    Whether silver and sleek, or tiki-style, barware is hot -- and the great news is that in this category, style trumps brand name. Griffith says there were few mass-produced cocktail sets from known manufacturers in the '50s and '60s, so as long as your piece -- whether it's a cocktail shaker, strainer, mixing spoon or jigger -- looks vintage, it's worth something. "Atomic" and "rocket" styles are especially trendy right now (in silver); they sell for $30 to $40.

  • A Dining Chair

    These days, <a href="http://www.hgtv.com/decorating/6-dining-room-trends-to-try/pictures/index.html" target="_blank">people are mixing furniture styles, fabrics and finishes</a> -- which means there's probably someone out there who'd love just one or two of your wooden chairs with the upholstered seats (so you can keep the rest and mix in some new chairs yourself). If they're painted white, even better: the light color makes them look modern. A set of two can fetch around $275. <strong>Next: <a href="http://www.oprah.com/money/Kitchen-Items-Worth-More-Than-You-Think" target="_blank">Find $2,168 in your kitchen</a></strong>