Can canon ef500f4 still be bought?

Yes Canon EF500mmF4 is an L-class large aperture super telephoto fixed-focus lens for professional photographers and enthusiasts. The main part of the lens is mostly magnesium alloy and part is titanium. As of July, 2023 10, it has not been discontinued and can be purchased. Canon is the world's leading comprehensive group that produces image and information products, aiming at creating world-class products and developing towards diversification and globalization.