I like the idea of pushing the market aspect and bit more. Especially considering there should be some sort of "insurance and trust" between forum users (at least the upgraded ones).
I don't fully agree with all of these,especially the sales tag, considering they will most definately be abused. The revamp chat should be something to be looked at, considering the one currently takes forever to communicate and discord is considered "off-site". Regardless though, this should be a good stepping stone when considering changes.
Style points for using the correct plural form of forum.