Is there any point to saving money (collecting)

My mom is into saving them. She has like $20 worth of every state that has come out. I dont know how they are now but in the classifieds in the newspaper i saw people looking for certain states and willing to pay 30-40cents for each. Im sure once all 50 states are out people will pay decent money for complete sets. And as the first ones get harder to find prices will go up.