Question On Grading Darkened Coins

I am not keen on heavy (especially blotchy) toned coins in AU or better condition.
Such toning can make it much harder to find very fine hairline scratches, when grading for yourself, using on screen pictures..
That makes it harder for the eBay seller, unless the coin is slabbed.

These pics a case in point.

i'll add that having the coin in hand helps as you can rotate the coin without the glare of lighting. it takes a lot of practice to be able to see through the toning to attempt to determine what the actual surfaces look like and if any luster remains. sometimes the toning is so heavy it pretty much impossible. the reverse of the mercury is pretty heavy and probably would be just a guess determining these surfaces. there may be luster under all of that. looks like there may be some luster on the obv but again it could be light glare. the high point of the devices are saying high AU or MS but this is coin you need to assess in hand. other than that oriole and sel_69l called it. personally I dont like toned coins as many end up like these over time. toning progresses over time and the way a coin is stored affects the progression. my guess is this coin was improperly stored for years most likely in a more humid environment.

there are 2 reasons to grade a coin

1. you have a rarer coin that needs authentication and preserved
2. you have a coin valued at $150 or more and you are planning on selling it

you have neither with the dime. I have no idea what 50c piece is worth the 42 is common coin with a mintage over 205mm an is worth a couple dollars.

it doesn't make sense unless a coin is worth $150 or more. most seasoned collectors dont even slab their coins due to the cost. you could expect to spend about $22 plus shipping/insurance per coin each way plus a subscription to a grading service. PCGS charges a minimum of $69 for a subscription. so you can see it really is not worth grading any average coin

Looks like normal silver toning but fairly advanced. Some collectors like toned coins and some don't. No matter what - a coin is what it is.