Walmart offers the Play-Doh Town Pet Store Set, model no. B3418, for $8.88. (Amazon has it for the same price with free shipping for Prime members.) Opt for in-store pickup to avoid the $4.97 shipping fee. That's the lowest price we could find by $6, excluding the mention below. It includes a store front, hamster cage, cash register, sticker sheet, birdcage, fishbowl, basket, and four cans of Play-Doh.
A close price: Kmart has it for $9.99 with free in-store pickup.