I generally collect
SW items such as boxed sets and booklets that contain alot of accessories (cut-outs, chits, player cards, maps, etc.) so I know the items are complete. Genuine, unopened items are generally more valuable and costly.
However, unopened items, especially if they are old, have not been stored in dry conditions and have holes/tears in the wrapper, can be damaged by excessive humidity, mold, and staple rust. You never know until they are opened.