A couple of recent results from Broad Arrow Auctions:
5s151 - not sold with a high bid of $400K
https://www.broadarrowauctions.com/vehicles/pb22_0091/1965-shelby-gt350
5s112 - "1 0f 5 public relations cars" sold for $373,500
https://www.broadarrowauctions.com/vehicles/pb22_0092/1965-shelby-gt350-public-relations-race-car
When I was looking into buying a 65 a few months ago, I was assured by one of the powers that be that I'd never find one under 4. Glad someone got a decent deal on #112. #151 looks pretty good too.