Do yourself a favor and stay far away from that coin. Blue IHCs, whether truly a product of MS-70 or naturally toned, have a bad rap in the marketplace. Some would say it is deserved (to include myself), others would say collectors are confused and this toning is caused by mint-issued tissue paper. Either way, I would strongly recommend you stay away from any monochromatic blue/purple copper like the one pictured in this thread. The fact that the coin is in NGC 66 BN holder also doesn't help the coin. This is a problematic grade, IMO, for a number of reasons, and even if the coin was all there (it is not, IMO) they tend to be valued more like a 65 than a 66 in the marketplace.
Idk about that part of it sir, so fair enough. I would wager, though, this coin does not really look like this in hand. I cannot comment on todays market acceptance though. I am simply not buying in this market area. They used to be accepted fine 20 years ago.
They do now. It took the TPG's a while to figure out what was causing it. If it was cracked out and resubmitted there maybe a 1% chance it would grade cleanly.
Blue IHCs doesn't always mean bad either. Some of them are very natural and not all of them have been treated with chemicals. Not all of them are exclusive to NGC holders either. I used to own this one and it was very natural in my opinion and was worth a huge premium. [video=youtube_share;9QwEziDw5OA]http://youtu.be/9QwEziDw5OA[/video]
Here's a quick tip in order to tell the real blue/purple from the faked/MS-70 blue/purple. If the coin has no skin and looks "shiny" then you should be concerned and avoid the coin -- it is almost certainly artifical. If the blue hides under a skin and looks more matte, then you should still be wary, but it is less clear-cut, and as Illini420 pointed out there are some naturally toned examples. That doesn't change the market perception or the advice I've given you, however. I would be very careful around these coins if I were you. Good luck...Mike