A match-worn shirt is a shirt that was worn by the players during the game. Unless otherwise indicated in the description, the shirts are offered unwashed.
A match-issued shirt refers to either a shirt prepared for a substitute who did not play or to a shirt prepared for a footballer who played but did not wear the shirt. The shirts may or may not have traces of use, as some players use them for warm-up sessions as well. Many footballers wear multiple shirts during a match.
A match-prepared shirts are prepared, but not for a specific match. They are, for example, shirt prepared for a player that ended up not being in the started team of a game.