Presumably, the most efficient markets are operating on a trust-based model. Reputation on the dark web is probably extremely valuable, and so vendors and buyer

Presumably, the most efficient markets are operating on a trust-based model. Reputation on the dark web is probably extremely valuable, and so vendors and buyers change their behavior based on each other’s ratings. Buying from a new vendor with no rep is extremely risky, so the buyer should expect a steep discount or otherwise for taking the risk.