11) What do some people do with their collections once they have them?
12) What is a collector's item?
13) What type of items can be a collector's item?
14) What might motivate someone to become a collector?
15) What is the difference between a collector and an investor?
16) How do collectors keep track of their items?
17) Is it possible to make money from collecting?
18) What is the most valuable collectors item?
19) What is the most sought-after type of baseball card?
20) What is the world's most valuable comic book?