True, someone probably got their gold sold. I have been trying to sell 15k gold over 2 weeks now without any luck.
F9 system is just outdated. Its from the time when store did not have gamebreaking impactful items such as ascended unity stones that are essentially impossible to get as f2p.
If they wish to keep this line they should let us sell gold for HMC in a way that is not based on chance.