If you go down to the MS-69 grade, the price often drops by 25-50%...sometimes more !! Lots of people chasing "perfection" drives up the price....and believe me, very few here can tell the difference between a 70 and a 69. So while I have a few conversation pieces with the 70-grade....I also have some 69's that look to me as blemish-free and I paid half or less than what it would have cost me for a 70 coin. This includes ASEs and some silver commemoratives that cost me $75 - $300.
I never could bring myself to collect coins graded 70. Just too much money. With my luck the coin would turn ugly in the holder.