One can save buying used, but there are a LOT of counterfeit cables that’s often not easy to distinguish from genuine.
It helps to bolster confidence if the seller has the original purchase receipt, or the box/packaging it came with, or the seller has a great reputation.
Shortly after the product launch, I purchased Siltech Classic Legend for its highly regarded reviewed performance at a relatively affordable price point. Seemed high enough performance and safer than to try to buy Siltech used.