I believe this linked VF30 coin may be a comp. which has a value far less than a CC coin: https://www.ebay.com/itm/1448244036...vLefQetb+fpfkwRO5|tkp:Bk9SR9zCk6ugYQ&LH_BIN=1
On the reverse, my eagle shows less detail on the wings and down around the claws. Admittedly, this is the first coin I've really looked at and tried to grade.
No. Only the condition of the coin. And, I agree with the others - I don't see any problems on this coin, just honest wear. I think it makes it to 20, but I don't think it goes any higher.
Welcome to CT, @IrishLuck. As you probably know, trying to grade from photos is just a guess, even by the more experienced members. Your photos might benefit from having two different light sources. Say 10:00 and 2:00. Also, I'm not sure what app you might be using for editing your photos, but here are a few online apps that are free: Lunapic https://www10.lunapic.com/editor/ http://x.photoscape.org And to remove backgrounds, if you should need it: https://www.remove.bg Good luck.
The fellow that posted above, @physics-fan3.14 is actually the author of a well detailed book on coin grading called the Art and Science of Grading Coins that I would recommend for anyone that wants to get a handle on grading. But an absolute must have for every collector is the Redbook of US Coins. That one is an absolute must for anyone from the person with an occasional interest all the way to those of us that obsess constantly over our coins. Doesn’t matter if it is the latest edition and often year old copies can be found at overstock type stores for pennies on the dollar.