Canon USA direct store currently has a hot deal on refurbished Canon EF 100-400mm f/4.5-5.6L IS II USM lens.
Refurbished Canon EF 100-400mm f/4.5-5.6L IS II USM lens – $1,583.28 – at Canon Direct Store
You will also get 1-year Canon USA warranty.
Regular price for EF 100-400mm f/4.5-5.6L IS II USM lens is $1,999 at most US stores.