You can sell Blue Chip stamps through a number of online retailers such as eBay and Mystic Stamp Company. Blue Chip stamps could be collected and redeemed for merchandise at special redemption stores until the 1980s.
The value of Blue Chip stamps varies depending on the year of the stamp and its design. Blue Chip stamps were manufactured by the Blue Chip Stamps Company. They were intended to be used as trading stamps. People were given a specific number of Blue Chip stamps at retail locations, such as grocery and drug stores, based on the value of their purchase at the location.