You are selling at market rate.
Yes but it's not simple with the combination of 3 erratic values, btc, gold, fiat
1. What kind of discount you offer for the whole lot?
The whole lot at 0,65 would cost 39
BTC, I can offer a discount of 1
BTC that is more than 2%
2. How can you guarantee the coins are authentic?
When they're in your hand it's very clear they're made of gold but how can I guarantee it in advance?
I have a copy of the invoice when I bought them but I could have forged it, do you have any suggestion?
I'm also worried that the buyer could claim that the parcel contained only a brick and ask for a refund, or
the buyer can be worried too that I send him a brick. I propose that the buyer agrees to film with his smartphone
the opening and inspection of the parcel's contents, this will settle any dispute.