Twist ‘N Turn Barbie from Mattel (1967)

In 1967, Mattel introduced Twist ‘N Turn Barbie, a redesigned version of its popular fashion doll featuring a new twisting waist. To promote the launch, the company offered a special introductory trade-in promotion that allowed customers to purchase the new doll for $1.50, less than half the regular retail price, when they traded in any old Barbie doll.