Unfortunately selling wedding photography for $600 dollars is an extremely unsustainable way to do business. The result of this is naturally trying to minimize expenses associated with the cost of doing business in order to actually try and make any money out of it.
This means that the photographer is probably not accredited, most likely does not have public indemnity insurance, may not be able to provide you images taken on the best quality equipment (and I stress that a photographer's eye is more important than the gear, but in a dark church or reception venue the best equipment is the order of the day), and generally isn't going to go far and beyond to help you with your day simply because they aren't making any money out of it.
Personally I believe every couple should find the photographer who produces images that speak to them, regardless of whether it is through me or not. What I do say however is that like most things, you generally pay more for something of quality. The best wedding photographers are talented artisans.