From a mintage of 11,279 Proofs, the 1940 is widely available up to and including PR-68. Proof 68+ coins are rare, and to date, no cameos have been certified by either service.

View 1940 Walking Liberty Half Dollar Auction Results

The example to the left was sold by Stack's Bowers Galleries in June 2012 Baltimore Auction, where it realized $3,760.