Cheap cameras are good enough, until you need them.  There are thousands of possibilities for security equipment available across the internet.  If low price is your only consideration, be prepared to get what you pay for.  We run into customers who struggle with cheap systems.  They try to save a buck but end up with a system that doesn’t run and requires constant maintenance.   We all what what we need at a good price.  There are good deals on the internet.  But the cheapest system is not always the cheapest.