Where To Start? Bag? Box? Roll?

Well I know I get a bag on pennies for $50 and Boxes are $25 Nickels are $200 a bag at my bank. It boils down to a matter of choice. More to search through with smaller change IMO.

Well when I get a Bag it's a large plastic bag that is sealed. It's not the cloth bank bags. I will say that rolls seem easier to deal with for me.

For one thing you if you have a flea market in the are, try them for an assortment of magnifing glasses. By me they one seller has an entire table of them. Some with stands, with lights, a two lens one for your head and lots, lots more. I like the ones on a head band. Great for removing splinters in my hands.
If at all possible aquire coins by the bags. Usually those have just come in and not run through the rolling machines. If you buy any rolls of coins they have been run through a rolling machine and may have additional scratches, marks, etc.
If you think a bank person will give you a hard time about buying bags, tell them it's for a joke. You give large amounts of pennies for wedding gifts as a joke. Many banks think it's funny and will go along with you. Of course it you do this frequently, they'll start to realize you just couldn't get invited to that many weddings.
The main thing with bags of coins is they are in a vault, not at the teller's window. This means they would ether have to go to the vault to get them or find someone to do this. Make sure you oly make such requests when the bank is extreamely slow or they will just say we don't have any. You would be holding up many customers with real buisness.