These are official charts used by pilots to plan flights and navigate. Charts are only valid for a period of time (ranging from 56 days to a few months, depending on the type of chart). These are expired and cannot legally be used for flying anymore. However, the FAA doesn't care if you want to use them for wallpaper, photo mats, art projects, or anything else you can think of.
Get one or get them all at less than half retail price. Price is per chart. May have pencil marks, highlighting from use.
Sectional Chart- These are for figuring out where you're flying based on landmarks that are visually identifiable (lakes, mountains, coastline), so they show geographic detail. The first photo is an example of this type of chart. These charts look more like a typical map, with colors giving elevation information.
Instrument Chart- These are for flying in the clouds. When you're flying in the clouds, you can't see the ground, so you don't care where geographic details are. These charts feature "airways", or designated routes pilots follow between radio navigation facilities. These charts look more technical than the sectionals, and are not as colorful. The second photo is an example of an instrument chart.