There are some great deals to be had on Fiverr I've used some of the voiceover artists and been very pleased.
The things to remember though are the "Extras" of varying amounts that can add up to a fair bit. Some charge extra for a quick turnaround and, like everything else in life, there are always enhancements to the base model like "For an extra XXX I can do a YYY".
I have heard of people making a good living this way. Also, as others have said, even $5 goes a long way when the going rate is way, way below our's.
Ray