Luan on a free transfer, he's young, but you'll need to train his speed. Also, try to get an older one on a free, too, someone like Ibrahima Faye.
//Edit - Luan was touted as the new Maxwell at the start of the game, he's developing nicely, but don't get your hopes up if you read that - he's fine for a league like the SPL but he is no world beater.