How about all of the above. LOL
I have dumped a few in the trash, some cause they cracked, some just because they were so old or so used that there didn't seem like any better alternative.
I have left one or two on the rack at a local alley as well. They weren't as bad as the one's I threw away, but not worth the effort to try and sell or in good enough shape to give away.
I have donated some. I had a bowler friend who gave them to jr high/high school bowlers so they could have their own ball and enjoy our sport. Or I have given them to my local pro shop to plug and sell at a cheap price to others.
And lastly, you can try posting them on here and try to sell/trade them. I put a list together of what I had and gave it to friends as well and asked for their best offer on anything they wanted.
Or you can just keep them. I have a bunch of those, although your wife may not like that idea....trust me on that one, lol.