That do exist it is called selling avatars for gold and other CS items. Elsword you can do the same thing and many other games such as Dragon Nest where commonly used CS items can be sold on the AH.
The work you guys are doing is really appreciated. It's definitely not often that a game comes back from closure, just like you said. The fact that this game did is a testament to both its fan base and to your desire to please the fans. We are all incredibly grateful for the opportunity to play this awesome game again - even those of us who keep asking for the blitz system to come back. You should know that for every person telling you to get rid of blitz, there's another one who is happy with what you chose because it ultimately means we get to play DFO again. The day you do choose to buy DFO Gold and open the cash shop, rest assured many of us will gladly throw our appreciation at you for it. The thought of decking out my characters in awesome outfits is fantastic! I never thought I'd get to drop money on DFO Gold again. If I have one question, it would be - When does fatigue reset? Will it be at the same time the game launched? Or will a new time be picked?
Aside from that, once again, I would just like to thank you as much as I can for bringing this game back. Thank you!