Knives are where case opening really stops making financial sense. The odds of getting anything decent are low enough that buying directly is almost always the better move once you know what to look for. Spent a lot of time confused about why similar knives had such different prices before finding https://befitnatic.com/cs2-wiki-knife-database-models-finishes-and-market-values/ which breaks down every model, finish type and what actually determines value on each one. Pattern index and float ranges are covered properly there and it makes comparing listings a lot more straightforward than just guessing based on screenshots