Old Antique cast iron toys can be worth anywhere from $20 up to Several Thousand Dollars Each depending on the Style, Manufacturer, color and condition. Some colors were more rare than others and so are worth more money than others. The Most Important thing with collectibles though is Condition. Condition of Collectibles is everything!
There is, however, a major problem with cast iron toys these days. In the last 10+ years China has been mass producing fakes that are purposely made to look like old antiques. These Fakes are being sold in flea markets all over the US. Many people then try to pass them off as real ones. This type of activity is totally discouraging many real collectors and now prices for the real ones are plummeting. This is because collecting Cast Iron Antique toys is no longer fun for collectors. The fun is taken out of collecting when con-artists and scammers flood the market with millions of fakes that look very close to the real ones. Currently there Far more fakes on the market being passed off as real ones than there are actual real die cast antique toys.
Counterfeiting collectibles seems to always ruin a collectible market. So beware when buying Antique Cast Iron Toys. Just assume that 95% or more of the ones being sold out there are fake, counterfeit items.