Hi Everyone, really sorry to ask what might be a boring question.... I have been on the look out for a good used Cannon 300mm f2.8is lens for some time now. Have been keeping an eye on Wx,MPB , Facebook, Gumtree etc but just cant seem to find one. Anything thats available is the newer version thats crazy money or the R version which is even more. Can anyone point to somewhere that I havent been looking so far?