I have used fiverr as a buyer. Many great sellers, of course just like anywhere there are a few scammers but do your due diligence and you will save being taken for a ride.
It worked for me. I would have ordered more than 20 gig and bad experience with 2 or 3. No money lost, only cancelled or the seller was removed. Break up your large order in small pieces and pay small amounts to save money getting stuck in fiverr account