When I decide to get rid of an old ball that I don't use anymore, I just put in in the ball rack at one of the alleys.
Just like what others around here do.
Seen a few Hammers there, a Widow ball was there at a point.
A few Storm balls are there.
One Track ball, as far as I know.
Some Brunswick. I left a Slingshot there. Someone picked it up and made some tweaks to the holes, but put it back.
Might leave the Sinister there soon.
So if any of you ever come to my hometown, Bergen, Norway. Visit that alley. Called Bowling 1 Sandsli.