value wise on ebay they are selling for $40 at 66 you're looking at and at 67 $170
if you dont have a subscription to PCGS and decide to slab it through them it would cost you about $80. personally I dont slab my coins and the reason is that it chews up the coins value and takes decades if ever to recover the costs. if you are planning on selling it then it may be an option but if it comes back less than 67 you're throwing your $$ down the drain.
Nope. They are a part of the die at the time the coin was struck.
Also, graders are looking at the normal size coin in their hands. They aren't looking at enlarged images that allow them to see nicks and ticks. Closer scrutiny (a loupe) is reserved for higher grades, errors, or variety coins.
Words of encouragement are one of the major food groups. We need to consume them regularly to thrive and grow.