When I decide on buying a rare knife, I try to combine all three approaches. For example, I recently considered purchasing a stiletto doppler. I looked at the current listings to see what sellers are asking right now, then checked the price history to understand trends over the last few weeks. Finally, I observed community discussions and valuation trends to gauge general perception of the skin’s value. Using all three sources gave me confidence that I wasn’t overpaying and that the skin I liked was reasonably priced. It also helped me identify moments when the market temporarily undervalued a knife, making it easier to act without rushing.