Guild Wars 2

Lately I’ve been seeing things like pvp gambling rooms and selling arah paths for gold, is this against the rules?

I don’t know anything about the PvP rooms but ANet has stated that selling dungeon paths for gold isn’t a problem. (People in Guild Wars 1 commonly sold dungeons and runs to new areas)

Source
Hi everyone,
Just posting to inform you all that selling dungeon runs its NOT against the rules. People are free to do so. Please, exercise extreme caution to avoid getting scammed.
Thanks for your understanding

https://forum-en.gw2archive.eu/forum/game/gw2/List-of-Common-Controversial-Forum-Topics/first#dungeonselling

You can sell (or buy) dungeon paths, it will be legal as long as the run wasn’t done with exploits. If you get scammed (lets say you bought a path and then you got kicked) you can report that so that anet takes action regarding the scammer.