Well okay then! LOL
If this question was brought me back when I was 22 I would have said I have 10 NIB and 25 drilled. I used to bowl 5 nights a week plus practice 1 night. I had 5 4 ball bags. Each bag had a tag for which night it was setup for.
As of right now I have 10 total. 4 I use weekly, 2 not in the rotation and will be donated to the local youth league, 2 others retired and 1 after I'm sure the 1 newly retired ball is officially replaced will also be donated to the youth league. My wife has 3 of her own, she bowled for about 3 years then stepped away from it this year, she might not return back to it but we still have at least 1 ball and shoes in case that changes.
I can't imagine walking into a room full of NIB and drilled balls that exceeds 100 balls. Even the best stocked pro shop can't compete with that!