Hello,
It seems you have more than one thread open for selling art. Thats breaking this rule:
.III) A user may have more than one thread open if each thread serves a different purpose. Note that having multiple threads with the same purpose may result in infractions.
I am closing your other thread. Please read the market rules before continuing to use the market.
Also, if you want to sell more than head/set at a time, you can use the edit button on the bottom of your post and add it on there.
Thanks.