Buying and selling Gaian items with real money is not allowed and is a bannable offense for all parties involved.
Basically, Gaian gold & donations to Gaia are the only ways to get Gaian items. All Gaian items are copyrighted to Gaia Interactive, thus you are not allowed to make profit out of them, simply they don't actually belong to you.
This includes Gaia -> Runescape; Neopets -> WoW; Runescape -> Gaia; etc type trades for accounts, currency or items is NOT permitted. - Any sort of buying or selling of one online Gaming items/accounts/currency for another is not permitted on Gaia.
FAQ:
Q.What about Gaian gift certificates? Can I buy a Devil Tail with them if I give the other user the certificate number?
A. You cannot trade gift certificates to others in exchange for Gaia items. This follows the same line of reasoning as to why you cannot buy or sell Gaian items through such places as eBay. You are still attempting to purchase Gaian items for real money. This is a
bannable offense.
Q. I don't see why you can't trade $200 for a halo though, if u look on ebay, you see digital magic cards, and Ragnarok Online items for sale, you pay the people on paypal, then you go into the game and they trade it to you.
A. You are not allowed trade $200 for a Halo for the same reason you not allowed to trade digital magic cards and Ragnarok Online items, they are copyrighted and they have a ToS that specifies users cannot sell their items.
Q. So you mean even though I paid gold for my items, they are not really mine?
A. They are yours to play with on Gaia, but not to sell them for money and make a profit. The items and everything else on gaia is copyrighted AniHQ.
Q. If someone in the MiniShops wanted to sell, for instance, a framed print of a PuriPet on eBay (assuming that it was the creator of puripets who wanted to sell them, that is) would there be any problem with that?
A. If he's the creator, he can sell them anywhere for anything he wanted. But he cannot sell them on Gaia for real money because he would be profiting and using space and bandwith here.
On the same note, buying and selling
Neopet & other games items in Gaia is not allowed as well, it is illegal. Please continue reading to see their ToS paragraph about selling items.
I leave you with my favorite quote on the matter:
"koutoni"
Why on earth would someone offer $200 for something that's not even real?
If you see a thread or receive an offer through PM about selling or buying items for money, please contact a
Moderator with the link and name of the user.
As for selling other sites items on Gaia, if you read our TOS, AND theirs, you'll find its against the rules:
"Neopets User Agreement"
1. The activities and games here are just for you to play with while on the site. You can't sell them, give them to anyone, trade them for anything (including Neopoints), or pretend you made them. If you wish to do anything EXCEPT play with them, you can't unless you have our express written permission first. (By the way, this means you can't trade or sell your Neopets account, either!) You can display our pictures on your own personal web pages for your noncommercial and personal use ONLY, as long as you write either "Copyright 2003 Neopets, Inc. All Rights Reserved. Used With Permission" or "(c) 2003 Neopets, Inc. All Rights Reserved. Used With Permission"on EVERY page with our pictures and/or text and you link directly to us, but you can't pretend they are your own work. (By the way, this means that you can't sell ads, barter for stuff, offer your services, or otherwise earn money, Neopets' Items, or Neopoints either on web pages that contain our pictures and other Materials, or by using our pictures or other Materials, such as by offering to make Neopets banners or backgrounds for others.)
"Runescape User Agreement"
RuneScape Account
You agree that your RuneScape character and account and items are and remain the property of Jagex.
You may not sell, transfer or lend your account to anyone else, or permit anyone else to use your account, and you may not accept an account which anybody else offers you.
"Ragnarok User Agreement"
10. Intellectual Property
Gravity, including, without limitation, all communication features of Gravity contains copyrighted material, trademarks and other proprietary information including, without limitation, text, software, photographs, video, graphics music and sound, and the entire contents of Gravity and each area contained therein are copyrighted as a collective work
under the Republic of Korea copyright laws. Gravity owns a copyright in the selection, coordination, arrangement, and enhancement of such content.
User may not modify, publish, transmit, participate in the transfer or sale, create derivative works, or in any way exploit, any of the content contained on Gravity (including, without limitation, content that the Website enables you to download) without the express written permission of the Gravity and the copyright owner. In the even of any permitted copying, redistribution or publication of copyrighted material, no changes in or deletion of author, attribution,
trademark, legend, or copyright notice shall be made.
"Gunbound User Agreement"
9. Intellectual Property
SOFTNYX, including, without limitation, all communication features of SOFTNYX contains copyrighted material, trademarks and other proprietary information including, without limitation, text, software, photographs, video, graphics, music and sound, and the entire contents of SOFTNYX and each area contained therein are copyrighted as a collective work under the Republic of Korea copyright laws. SOFTNYX owns a copyright in the selection, coordination, arrangement and enhancement of such content.
User may not modify, publish, transmit, participate in the transfer or sale, create derivative works, or in any way exploit, any of the content contained on SOFTNYX (including, without limitation, content that the Website enables you to download) without the express written permission of SOFTNYX and the copyright owner. In the event of any permitted copying, redistribution or publication of copyrighted material, no changes in or deletion of author attribution, trademark, legend or copyright notice shall be made. The downloading of copyrighted material from SOFTNYX is allowed by the user expressly for the user's own use. User acknowledges that SOFTNYX and/or third-party content providers remain the owners of all materials posted on SOFTNYX, and that the user does not acquire any of those ownership rights by downloading copyrighted materials.