The account must not have been transferred before.
It's 1 transfer per account. If you have already transferred your character then you need a pre-modded fresh account.

RGHMistaFount wrote Hows it the sellers fault,theyve gave him what he paid for "a pre modded account level 8000" once that account is downloaded to the customers console it becomes theres. If the customer asks before purchasing if the account can be transferred then the seller must make them aware,in my opinion there was a lack of communication and research from both parties and you cannot go effectively getting someone penalised for that. The Buyer should make clear hos intentions when the account is in his possession and do research before hand. And the seller should make the buyer aware of the the current transfer situation before making sale,and modders are not mind readers be clear of what you want and what your intentions are when purchasing and perhaps learn a lesson from whats happened with this guy.

Still a scumbag, I didn't know transfers were down until I was browsing the GTA forums and if you look at the OP, doesn't seem like he browses TTG as much as I do so you can't blame him for not knowing.

And I guarantee you OP told the seller that he wanted a premodded account to transfer, so then the seller knew OP didn't know transfers weren't working and wanted to make a quick buck.