Types
Tonka trucks were produced as far back as 1947, but the most popular truck -- the Mighty Dump truck -- was not manufactured until 1964. This introduced the Mighty line of cranes, shovels, bulldozers and other vehicles. These are considered to be classics and are popular with collectors.
Price
Prices for older Tonka trucks vary depending on the condition, scarcity and collector's interest. Toy collectors say that a collectible toy appreciates in value during the first 60 years of its life. Tonka trucks aren't quite that old in 2010, but asking prices for a pre-1980 Mighty Dump truck range from $100 to $600. Mint condition trucks with the original box fetch the highest prices.
Fun Fact
The Winnifred Museum in Winnifred, Montana boasts what may be the largest Tonka Toy collection in the world. Over 3,000 Tonka toys are displayed in the museum.