Both of those things confused me for a long time. Spent ages just browsing listings without really understanding what I was looking at. Found https://befitnatic.com/cs2-wiki-knife-database-models-finishes-and-market-values/ at some point and it has a proper breakdown of models, finishes and what actually drives value on each one. Covers the differences between knife types and why certain finishes command such different prices depending on pattern. Genuinely useful if you are trying to make sense of the market before spending serious money on anything