Why do you feel unfree, when people are trading goods a certain way in your community?

Do you want to be like the government/corporations? Playing the police? If someone is caught trading in this way in this community, then he is banned!

Doesn't go against freedom, btw : but hey, you're free to choose your commune, so no problem, as long as you don't want to attack MY commune.

though if someone needed to learn how to build a house, they would have to work in order to buy a book on it.

Or negociate with their neighbors and ask them how to build a house or telling them that you will pay for it later, borrowing money...etc

Now, there are only a few types of market products, including luxury items and art. But it might seem silly to trade these away.

No, because trading helps fuel innovation