Our league did a trial last season of balls
We used balls from every make and price range And had to rate them blind, after games
Then at the season end, I was asked to cut the samples in half, as I’d complained for years about ball quality being used.
Out of over 60 balls from different suppliers, by far the best were the mid and top end tiflex balls.
Nothing and I mean nothing under 13 or 14 quid is going to be anything less than a bat breaker
If your really not sure, cut one in half.
There’s some decent money to be made selling balls that are well below acceptable standards and a lot out there willing to sell them