buck

My son (20 years old) has a large collection of lego star wars sets. They have all been put together and are in perfect condition. Never played with. He is going back to school and now needs to sell these. What is the best way to sell these and what items are the most wanted. Is there several sets someone wants bad. Is it possiable to ship these intact or take them apart. I thought about putting them in a plastic bag and then packing in a box and shipping. thanks for any help