Once a great international market - now irrelevant for anyone outside China.
I used to love Buff163, because it was the largest CS:GO skins market available, and it was accessible to everyone! A few months ago they it impossible to sell items without having a Chinese bank account (which you obviously need to be a Chinese citizen to have). This effectively made the site useless for anyone outside China. Having the site be accessible only by Chinese citizens, makes it more complicated to trade and buy skins. I now use two different sites for the best deals (which is complicated and slow due to 7 day trade holds), whereas Buff163 was one, large market, making it simple for the end user. Hopefully buff will come back to its former glory at some point.