You cannot buy houses, slaves or animals unless they are needed for Yom Tov. You can also buy them if the seller needs the money for food.

You cannot move objects from your house to another but only to your own courtyard.

You cannot bring utensils from a craftsman on Chol Hamoed unless you are afraid they will get stolen then he can take them to different courtyard.

Moed Katan 2:5

You can cover drying figs with straw so they will not get ruined. R’ Yehuda says you can even pile the figs to protect them and it is not considered extra work.

You can sell fruits, clothing or utensils as long as it is not in the public for the purpose of Yom Tov.

You can trap, make cereal or bean smashing  as long as it is not in the public for the purpose of Yom Tov. R’ Yosee says these people were stringent and didn’t even do these things in private.