Amazon offers the Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens for Canon
bundled with $5.98 Amazon credit
with free shipping
. Assuming you'll use the credit, that's $6 under yesterday's mention and the lowest total price we could find by $6. Sales tax is added where applicable. It features optical image stabilization, 4x zoom range, and more.
The credit will be added to your account 35 days after shipment.