#1 - Sept. 26, 2013, 8:58 p.m.
Don’t sell until is fix or you will lose all your items sold.
The trading company is not working
#2 - Sept. 27, 2013, 11:07 p.m.
This issue was resolved and tracked here: https://forum-en.guildwars2.com/forum/support/bugs/Can-t-sell-anything-on-trading-post/page/2