Most people have very positive experiences buying and selling items on the internet.
If you have concerns, you can make your transaction supersafe with an escrow service. The seller ships the merchandise which your can then inspect, and decide to accept or reject. If you decide to accept the merchandise, you notify the escrow service and they will send the funds to the seller. Their prices are very competitive, and they are very responsive to questions. From our perspective, they are the best service out there.