From #1 to #150, I'd say I bought about half my current ASM collection raw.
Although for the books under #25, I had some 9.4s and 9.6s come back from CGC but they were mostly of 9.2s and 9.0s. Fortunately, I was able to sell those and buy nicer copies before the prices got too nutty.
My #3 (9.4), #7 (9.6), #12 (9.4) were all bought raw which makes me particularly fond of them.
For the books after #25, my success rate was much higher. But if I had a book that graded a 9.4 (and there were many), I would buy a 9.6 and sell the undercopy.