The secondary ticket market is where tickets can be sold after the original purchase from the “primary source” (venue, box office, team, artist, Ticketmaster, etc.). Prices are determined by the sellers (who own the tickets), and tickets can often be more than the “face value” of the original purchase price from the primary source of tickets, depending on market value.
A resale marketplace such as TickPick brings the buyer and seller together so that tickets can be bought and sold.