I'm not so sure about ranking Marvel #1 and All-American #16 that low.
Are there any recent sales for Marvel #1 in CGC Universal low-grade?
But as I mentioned in a prior post, compare the recent sales of Batman #1 (ranked #4) to All-American #16 (ranked #10).
A CGC qualified, unrestored Batman #1 in 1.8 with OFF-WHITE PAGES sold for $10,050:
http://www.comiclink.com/itemdetail.asp?back=%2Fitems%2Easp%3Fid%3D3852%26FROM%3D%26TO%3D&id=957645
A CGC universal, unrestored All-American #16 in 1.0 with BRITTLE PAGES sold for $11,250:
http://www.comiclink.com/itemdetail.asp?back=%2Fitems%2Easp%3Fid%3D3868%26FROM%3D%26TO%3D&id=961785
Whoever paid $11,250 for that All-American #16 with brittle pages most likely overpaid, possibly just wanting a copy - any copy - and being willing to overpay in order to not have to look for another one. I doubt that book will ever fetch that much again, if it ever gets re-sold.