or maybe just messages. you can work out a time and place to exchange items. There have been many times where i wanted to leave someone a message regarding their res. Compliments mind you, or to ask them questions about how they did something. I think an ingame mail system is an amazing idea
or mabey we can all wait a month for the next update and get book and quills and wright a meessage in those to ask players for things or exchange items so that might work as a note to them. also i just accidently said no as i coughed on the exact second i was gonna say its a good idea. still a good idea