15. Barbie

The Barbie Doll is 64 years old, and with these six decades, many different dolls and accessories have been launched that reflect the times. It represents a significant market for collectors and sellers.

Early Barbie dolls in good condition can be quite valuable. The first Barbie, released in 1959, is especially sought after. Currently valued at $27,000, the Barbie #1 was originally sold for $3. The Dahlia Barbie, released in 2006, can be sold for over $2,000. 

You can find out how much your Barbie doll is valued using Value My Stuff and Barnebys.