I've bought and sold on Fiverr for the last 3 years and find it very reliable. It is so much easier to use than any other freelance site I can find, and a lot less expensive on both sides! There are a few minor bugs and of course there is always someone trying to scam someone else (EVERY website has this, people!) but I've learned to work with the flow and enjoy the extra income and the extremely cheap business and personal services!