Dan Theilmann's collection of Coca-Cola items includes a Vendo 23 vending machine from the 1960s and cufflinks from 1929, but equally avid collector Darrell has brought a Coca-Cola tire display in hopes of making a trade with Dan.

Appraiser Daniel Strebin puts an estimated value on Dwight Cleveland's collection of over 4,500 vintage movie posters and offers to trade a one-of-a-kind poster from the early 20th-century film "Undine."