I strongly recommend you do not place any orders on SR until you have thoroughly read the SR wiki (link is in the sticky in the FAQ) and spent some time on the forums researching how to safely navigate this place. Finalizing early is not advised, if you do you have no protection and support from SR if you run into trouble with your order. Go and read up on the escrow system in the buyers guide before posting anything further then report back if you still have questions.