What do you do with all the extra coins after you find the keepers? By keepers I mean the old ones you pull out not the reg stuff that goes back to the bank.
Talk to people at your bank. Ask if they mind your returning the rolls when your finished. To avoid creating any ill will, I deposit searched rolls at a different branch. This also keeps my activities more private
I too have a "dump" banks. I have accounts at a couple of banks, I buy the boxes at the downtown banks, and dump the junk at branches out in the burbs. I always mark the rolls I search with a symbol - I have seen my searched nickel rolls turn up at the tills in local stores a couple of times.