Its being sold for $3600 then you are selling it in your group buy for $4300? Lol.

Why would anyone in their right mind join your group buy?

The whole point of a group buy is to get the items cheaper.
I'd just buy it on my own if a greedy middleman will join in the cut. YOU sir are what BLOCKCHAIN tech is trying to phase out. No to greedy f-ing middlemen.

Besides, its not like buying it with you adds any value. The shipping/delays/etc risk is still there.