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Amazon [amazon.com] has 7-1/4″ DEWALT Circular Saw Blade for $7.98.
Shipping is free with Prime or on $35+ orders.

Lowe’s [lowes.com] also has DeWALT 7-1/4″ 24T Circular Saw Blade (DWA271424L) on sale for $7.98. Shipping is free for MyLowe’s Rewards Members (free to join [lowes.com]); otherwise select free store pickup where available.