Most people will tell you that its just cosmetic issues. But to me those are "blems". 2nds are going to have weird pin placements (too far pins or too close pins) in addition to the blem issues. Also the CG may not be actually where they say it is. But that goes for some manufacterers "firsts" too. But seconds can be some very weird pin to cg placements which makes the ball hard to drill and perform. Plus if the ball has a mass bias then you've added a whole new additional problem to the equation. Without a very talented driller, I would not expect much from a "second". Because you really don't know what you're getting.
If you are not an experienced driller and high level bowler....do not buy seconds from the internet. For you, you still have a fantastic learning curve to take advantage of, don't let a second rate ball slow you down for any price.
Lets look at it from a different point of view. If you are learning something (doesn't matter if its bowling,
Track or playing piano). Doesnt' it make sense to have the basic component (the ball, the correct
shoes or the piano) to be in its best working condition? Or how else will a learning person know if they are being held back by poor equipment?
Erin