All except the 1991 D dime are just damaged, the dime was struck with slightly mis aligned dies. This is quite common and carries no extra value.
That coin is badly damaged. I don't see any evidence of a doubled die, but I am sure the error experts will chime in. I see nothing to make it...
Definitely just damage.
The 1971 Two pence coin is very common. There has been a lot of false information going around about the value of the coins.
Those are small date. It is the 1982 D copper small date that is valuable, however there has only been one of them found I believe.
Could you explain where you think you see an error? The coin is badly damaged, but that is all I see.
Could you tell us where you see them selling for high prices? Higher grade circulated 1918 cents normally sell for around $10.00, but as stated...
Another cent was placed against this one and squeezed, this pressed a backwards "ONE" into this coin.
Is this the same damaged quarter you posted before?
Definitely need some clearer photos, can't really see anything in those.
As stated, your coin now has damage from the eraser, it may not be readily visible to you but damaged none the less. Once your coins are cleaned...
Could you point out where you see the doubling?
I see no indication that it is silver, and if the copper core is visible then it can't be. Minor weight variations are perfectly normal.
I just see a normal, beat up circulated cent.
That is from the zinc deteriorating underneath the copper plating. Very commonly seen, but that is a big one!
Yup, fourth one down is the best one.
Copper can tone or corrode many different colors depending on it's environment.
Yes, it is glue. They show up here quite often.
It's a large date.
What does the reverse look like?
Separate names with a comma.