Air-Tites Gone For 10oz Silver Bars?

At the one kilo weight size, there is far less premium per ounce on a cast bar than there is on a minted bar.
Cast bars don't really need airtight protection, but I would protect any cast bar that I may own in a polyethylene klip lock bag anyway.

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If the 10 oz bars you wish to buy are out of stock, order one on a future contract with a fixed price with a future delivery date.

Klip lock just minor protection, when stored with other items.
Cast bars are much less sensitive patination that minted proof finish bars.

For a 10oz silver bar that is just flat out silly in my opinion, but to each his own.

TheForce does not like toning. If he wants to take extra steps to prevent it, then so be it!