How much does this cost to the nearest dollar?

Canon EF f/2.8L USM Telephoto Zoom Lens for SLR Cameras
Product Description The Canon EF f/2.8L USM telephoto zoom lens is one of the finest telephoto zoom lenses in the EF line, comparable to a single focal length Lens. It has four ud-glass elements to correct chromatic aberrations. Its constant f/2.8 maximum aperture and superb image quality make it one of the most popular professional SLR Lenses in the world. Compatible with extender EF 1.4x II and 2x II. Features EF mount, telephoto zoom lens ultra-low dispersion glass, inner focusing, full-time manual focus focal length F2.8 constant maximum apertureultrasonic motor (USM). Diagonal Angle of View

Price is $688.00

Price: $688