Souvenir skins come from tournament drops and have special stickers that mark the match they were part of—player, team, and event info included. This is one of the best overviews on what makes them unique and collectible. The real value comes from historical moments—like a clutch play or major final—and the skin used in that game. For example, an AWP Dragon Lore from a major final with legendary players’ stickers can be worth thousands. I collect these not just for profit, but because they feel like CS history. If you’re into story-rich items, souvenirs are the pinnacle.