The last I saw, gold was going in the range of $0.10 - $0.20/G. So we can go with a price of $0.12/G equivalent in the cryptocurrency of your choosing.
I play GW2 in my spare time, but am not hardcore to the point that I value my gold over what I can get out of it on here (and I don't trust the sketchy sites to sell it to). So if other players want to buy it, I'll gladly help them in any amount they want (*not exceeding 150G/transaction).
You pay first, and when I see the transaction in the confirmation process, we can log and I'll send it via the mail system.
Thank for looking.
P.S. - If you think my prices are too high, please post or PM me proof of validation so that I may correct it accordingly.