Kiddo, no matter how you look at this it just feels like a breach of etiquete. You are advertising your art and services in someone elses gallery which by itself is an insult to the person who set up the gallery. If you think of this as an "artist alley" at a convention what you're doing is walking up to a table saying "oh this is nice" and pushing it to the side to try and sell your own work. It's not cool.
Secondly this isn't even the right thread to advertise that you sell avatar art in. This thread is just to display your past work for enjoyment and critique. If you want to discuss anything involving a gold transaction, take it the right thread.
You should have taken the time to set up your own gallery at the very least.
I'm not a moderator. Just a concerned artist so I know you don't have to listen to me, but I'm not going to sit by quietly while these things happen >_>;