What do the things in paraenthesis like “box”, “inst”, “case” and “overlay” mean?
These are to denote what exactly the game comes with. If a product is listed as [item name](box, inst), it means that particular item comes with the game, the original game box and instructions all in good condition. If an item is listed as “poor”, it means that it is included but not in mint condition. A “poor label” refers to something wrong with the cart.