Do not buy silver certificates, purchase actual silver.

If you’re looking to pick some up quick, call your bank and see if they sell it. You’ll pay a premium, but they’ll just debit your account and deliver it to your neighborhood branch a few days later for pickup.

For the best price, call your local coin shop or silver dealer. Note that if you want to buy a “lot” then you need to bring cash, or get your bank to up your debit limit for the purchase, or get a draft from your bank. They won’t take credit card and your debit card has a daily maximum. Check with the dealer to see what they recommend.