Currently the vendor selects a list of moderators they are comfortable working with, and then at the time of a sale the buyer selects the one they prefer. If a dispute is opened the moderator the buyer picked from the vendor's list will resolve the dispute.
What's in it for the moderator? I assume they get a cut of the escrow?
How is the moderator's reputation visible to a buyer? If there's some kind of rating system, why would the reviews be useful at all? After all, any situation where the moderator has to act will leave one party pissed off.
This seems like a lot of complication just to buy something on the internet... unless what you're buying is heroin. In which case the whole 100% p2p thing starts making more sense.
But how do moderators become moderators in the first place? How do I, as a prospective buyer, know that all the moderators aren’t all pre-chosen by big sellers (by fair means or foul) to be sympathetic to them?
Regarding “reputations”: Remember Goodhart’s law: “When a measure becomes a target, it ceases to be a good measure.”