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 Conventions :
Katsucon (Washington, DC) - Megacon (FL) - Colossalcon (OH) - Anime Weekend Atlanta (GA)
Upcoming costumes : Princess Garnet (coronation gown) from FFIX, Edea Lee (various costmes) from Bravely Default, and more!