This journal applies to all sales made on deviantART (deviantART, Inc. is in Los Angeles) and the US. There are international copyright resale treaties, and it can get intricate.
Before you post with the laws of your country, make sure you are aware this journal is about the purchase and resale of intellectual property, also known as IDEAS. I am not discussing the resale of commissioned art or anything else unrelated to adoptables, designs, characters, etc.
Bought a character or design the seller said you can't resell? Well give them the finger and show them this journal.
What you can do with a fully purchased intellectual property (character, design, etc, in this case!) depends on the details of a specific transaction, and what the agreement was or even implied IF any agreement was stated or implied. But no it is not even possible for some