Special Deals

Back in 2016 nobody really used Special Deals and joining here it has been kinda new to me. I understand some parts of it like:
1. Player needs to be in the range (Wifi icon)
2. Player gets loot shared with all the people in the party who are in the range.

But what confuses me is, that sometimes I see something I want and I roll Dice and nothing happens. None of my group members do the same.
1. What happens all those items there ? Do they go automatically into Special Deals sale ?
2. Do I need to stay in the group or I can leave and I still get the silver from those items in the bag or just money for the items what got auto sold (Greens) ?

Also I have times when when we stop grinding mobs and we have players A, B , C in the group. We all go own ways and stay in the group. Then player D joins and we still have items in the bag. Does this player D will be counted now on Special Deals even so he was not there for the mob kills ?

 

Basicaly every single item that is posted to Marketplace will stay there. If you want item posted to special deals, all party members need to roll or give up. Once all or most of them ( did this once in my life ), you will collect the item to your eq.
You dont need to stay in the group. Even if you leave it and join new all items posted previously will stay on MP, once sold money will be distributed to you
The money will be distributed only to players who were within range, and if new player join party, he wont get money from items that dropped before he joined. Only the items that was dropped and he was within range.