Reminds me of when I bought a used lawn mower for fifty bucks off a guy in a parking lot. Everybody told me it would die in a month and I needed a Honda. Ran that thing for six summers, just changed the oil and sharpened the blade. My neighbor with his fancy mower had it in the shop twice in that same time. Point is, the cheap stuff can surprise you when you take care of it, but the day it quits is always the day you got a full book. Your trimmer might cut great for 300 fades and then the motor just gives out mid cut on some guy's head. The pricey clippers are more about not leaving you hanging when it matters. Keep the cheap one as backup but dont toss the good set just yet.