Upload & Sell: Off
@blutch, using live view, magnified view, on a tripod, and manual focusing on a tripod is really the only way to ensure perfect focus and either get optimum results for slow, deliberate shooting, or to test to see how sharp your lens really is.
Using live view and AF actually uses a completely different AF system in your camera and should also be very accurate. But again, it's slower.
Viewfinder AF is very fast but can need tweaking (fine tuning) with different lens/body combos to get it dialed in. Even then it won't be as reliable as live view focusing. But tuning can dramatically increase your keeper rates with fast lenses. The fine tuning doesn't affect the live view focusing, only the viewfinder focusing.
You could also have perfect focus and still get unsharp images due to camera shake, a poor lens copy, dirty or damaged lens, etc. You're also introducing a printer into the equation now. So many variables....the important thing is to enjoy the hobby, improve your skills, and try not to obsess too much over the gear itself or endless testing :-)