Early A's getting pricey

Ya, I've noticed a bunch of '66's pictured on the net and for sale on ebay lately too. I haven't seen a '65 Formula S for a while, but a few '66 Formula S cars have popped up. I have no proof, but after watching the market for the last 7 years I've noticed there seems to be more '66 S cars than '65 S cars. They're nice because they all seem to have front discs and larger rear end but in '65 those things don't seem to appear.