IHC's and FEC's tend to be all over the place from the "big 3"
TPG's, as Snow noted. A raw coin in "strict" AU53 might come back anywhere from XF45 to AU58. If I had submitted this coin myself, it might have pulled a VF30. Big Dealer X submits it, now it's a VF35. Repeat with other
TPG's and probably get anywhere from a 25 to a 35. I think 30 is a good average. When bidding on coins such as this, I usually set a max bid at least 1 grade lower than the slab grade, for precisely that reason, a sort of "overgrade insurance".
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