So tell them they are utrip and then they should be able to make a decision.
I get that you want to be a friend to everyone you sell to, but at the same time the buyer needs to be informed as well. If you do your due diligence as a seller, then there is no issue.
Edit: and just to clear the...
I have the opposite issue. League is very safety conscious but we use 44 balls. I contacted the LD and said we should switch to 52s to save people and their equipment, but he said that people like the 44 coming off the bat better. After getting drilled 2 times in the last 2 seasons, I hope he...