It's the phenomenon that occurs when a frugal minded person sets out in an attempt to get a project done at the lowest possible price. A typical rule seems to be that this enterprising individual will purchase equipment from "god knows where" and have some guy doing side work install it. It works for a little bit, then it doesn't work.
Where is the guy who does side work?
So after a myriad of guys down the street and people who know people, there it is! He's calling in a Pro.
Pro makes his assessment and quotes a price.
Guy doubles over in pain and begrudgingly signs a contract.
Pro makes the repairs and everything is good.
Upon reflection Guy realizes he paid twice again what it would have cost to get a Pro in the first place and he still has cheap, low quality equipment. He balls his fists and grits his teeth in anguish.