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A number of refurbished lens is on sale at Canon inlcuding

EF 70-200mm f/2.8L IS III USM for 1399
https://www.usa.canon.com/shop/p/…is-iii-usm

EF 100-400mm F4.5-5.6L IS II USM for 1499
https://www.usa.canon.com/shop/p/…-is-ii-usm

EF 24-70mm f/2.8L II USM for 1299
https://www.usa.canon.com/shop/p/…-8l-ii-usm

EF 85mm f/1.4L IS USM for 999
https://www.usa.canon.com/shop/p/…-4l-is-usm