I wouldn't say that's the general experience, I know people who wasted $$ because they didn't even realize when they broke something, like the little snap you feel when you install a video card is completely different than a snap that happens when you force a huge video card in and break off a sata port that's in use, only to smell the motherboard burning when the machine starts up. Sloppy water cooling installations etc Sometimes things get tricky and inexperience can cost you.