They probably had it saved in Favorites? But yes, all Marketplace activity is being done on the forums right now. You should be okay posting as you have more than 10 posts and have been a member for over a month.
2014 - Upcoming Conventions :
Holiday Matsuri (FL)
Upcoming costumes : Suzie Q from JoJo's Bizarre Adventure, Edea Lee (various versions) from Bravely Default, Robotnik (genderbend) from Sonic, and more!