These books belonged to my Son. He is off to the Navy and I have to sell his books. I bet these books were read 20 times, Every one in his radius read them. So they are used, read books, and do show wear. I think the box set is pretty rare. I saw a couple on eBay, but none with the box sleeve that holds all 4. After books are read they become larger because the pages don't fit back together as flat. So the set doesn't fit back in the box sleeve as well as when new. For that reason, the sleeves often tear. This one did not tear. The glue gave way so no tear in the sleeve. 

I got it priced like everything else in my store: G Bensons Attic, to sell and sell quickly. Please take a look at the photos and make sure the condition works for you.