This server mostly runs off an FTE rule, any zones/spawns not on that rule is in agreement between the guilds that can/have killed them. If you are not on that agreement, your guild is not bound by it but also does not seem to be trying to interfere with it either (I would speak to your guild leadership about that).
As far as "Pieces of Shit" list, I doubt it will happen. If you are that paranoid, toss that name in guild chat and ask for opinions. If you think you are getting scammed, you probably are. If you want to know rough prices for items, find the item on the
P99 wiki to get a rough price on the item and then negotiate from there.
I think that covers everything.