There are some great multi-outfit sets for 18″ dolls (American Girl size) on Amazon. Some of them qualify for Prime, others have free standard shipping that is currently estimating arrival before Christmas. These multi-outfit sets break down to about $4 per outfit!
Note: This price was valid as of October 21, 2016 at 5:30pm. The price can change at any time, so please check carefully before completing your purchase.
5-sets 18″ Doll Clothes – $20.99 (eligible for Prime)
5 Dresses for 18″ Dolls – $19.99 & Free Shipping
7 Outfit Mixed Set 18″ Doll Clothes – $24.99 & Free Shipping
5 Party Dress Set for 18″ Dolls – $15.99 & $4.98 Shipping