Adorama has the Sigma 18-250mm f/3.5-6.3 DC Macro OS for $269 (Reg $549) today only via Adorama daily deals.
This would make a great all-purpose superzoom for your APS-C Canon DSLR or mirrorless camera (with adapter).
Lens Mount: Canon EOS
Zoom Focal Length: 18-250mm Lens
Image Stabilization Type: Yes (OS)
Lens Format: APS-C / DX
Maximum Aperture: f/3.5-6.3
Special Features: Aspherical
Lens Type: Macro SLR Lens, Wide Angle to Telephoto Zoom SLR Lens
Lens Series: Sigma DC Series
Sigma 18-250mm f/3.5-6.3 DC Macro OS $269 (Reg $549)