Sold at Auction: 1957 Hank Aaron Error and Corrected RP Baseball Cards Exponential Growth and Decay, 1. Aaron owns a rare baseball card. He bought the card for 7.50 in 1987 and its value increases, by 6% each year. Write and use an exponential growth function to find the Topps Tier One Baseball is back, continuing its reputation as one of the hobby's premier high end releases. Since its debut, it has delivered year after year with premium designs and a This Ultra Rare Baseball Card is worth MORE than your CAR! 1954 Topps Hank Aaron RC sells for A Lot Hank Aaron Rookie Card 1954 Topps #128 Market Value & Rarity