is it?

No it is not. You can view the Art Market forums a few boards down. Artwork can be purchased depending on the seller with sP, CSC (cash shop credits) or RL money.

cool. thanks for your help. just wanted to make sure before I tried it lol

No problem. Browse some of the topics to get a feel of what to charge. There is a section for users who are unsure of what they should charge.