Every set has a traded set it was the traded players that year and some better rookies after the year's original players set was produced. What's it worth not sure a sealed 1984 baseball card set you can buy for $50. In the mid 80's the baseball card business picked up and companies like Topps, Bowman, and Fleer greatly over produced and flooded the market. In comparison a 1970 Topps set depending on condition can bring average $8K.