Show your choices to a friend and then to an adult, asking them whether or not they would agree with your choices. Your newspaper's Classified section is useful for buying and selling merchandise. Search that section to find collectible items for sale. Choose one that you would like to buy. Write an imaginary letter to the seller, offering him or her that amount.
Many hobbyists enjoy visiting museums to see collections.
Museums in your area contain collections not only of art works but of toys, dolls, furniture, tools and much more. Check your newspaper for listings of the collections contained in local museums, and choose several you would like to see. Try to visit one or more. Some toys are popular collector's items. In your newspaper, find an advertisement for toys.