Yes it UN6037 in the COLOR pack.
Groupbuy fee covers things like mailing supplies, printer supplies like toner, any additional paypal fees I incur since they LOVE to doubledip transactions, currency exchange fee and general loss of value going from USD to EUR, wire transfer fee, shipping cost from GMK to me, customs clearance fees, other ancillary costs... generally there really isn't ever anything meaningful left at the end of all that and I calculate the fee carefully for this. The keys themselves have no mark up either are sold to you at same cost as GMK quotes me.
So it's all done with the intent to be non-profit.
It is nice to have a much lower than average cancellation/non-payment percentage on this buy. I only wish it could always be this way.