Discover the best prices on Adult barbie costumes Adult Costumes when you shop at BizRate for Halloween. Browse Adult barbie costumes in Adult Costumes to find the lowest prices from Mattel. Narrow your search by price range, product specification, store, or style -- even calculate your tax and shipping charges before buying Toys & Games products. Save on Halloween Adult Costumes at BizRate: Buy Adult '60s Barbie Costume and Barbie - Prom Date Ken Deluxe Adult Costume.