I don’t think trading should be that easy if it was implemented. To prevent lazy players from getting their guild master’s duplicates. Kinda ruins the game for those who work hard for it.
I think there should be something similar to the galactic trade network in Star Wars the Old Republic. The GTN allows players to sell their items for credits (in game currency), and as for safety, there is no way to be scammed. Once you put an item on the GTN, it is removed from your inventory until it is bought, or until the sell timer runs out. Which means you can’t scam anyone. Additionally, if you’re purchasing something, and someone else buys the item in question a few moments before you do, you get a full refund back from the GTN. So you can continue hunting for that item.
Items don’t necessarily have to be sold for gold. Quite frankly, gold doesn’t have much use, though for some players who have items to sell, can be very useful. Additionally, the current gold cap doesn’t really help either, considering you can only hold 300k. Still, this gives a “trading” feeling in tlopo, while forcing people to work for it, since they do have to pay in exorbitant amounts of gold for the bigger items.
It’s also quite interesting to track because it’ll end up having its own market and trends. Sellers follow those trends, and they’ll come out with riches.
TL;DR I propose something similar to SWTOR’s Galactic Trade Network, along with a gold cap removal. Or a bank.