Tamron USA authorized dealers BuyDig and Focus Camera currently have some great deals on Tamron zoom lenses.
Tamron SP 150-600mm f/5-6.3 Di VC USD lens – $1,069.00 – after $120 mail-in rebates – after $200 Slickdeal Rebates = $749.00 – at BuyDig.com
Tamron SP 16-300mm f/3.5-6.3 Di II VC PZD Macro lens – $629.00 – after $130 mail-in rebates – after $50 Slickdeal Rebates = $449.00 – at Focus Camera