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As TBH stated, it is a common series with over 90 million printed so there is no value unless in CUNC condition.

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Not an error, deliberate damage. Someone just getting creative.
Value 25 cents.

Which mint marks

There are no mint marks Bill, they were struck at the Philadelphia mint.

I agree, worn and polished. Would probably grade as a details coin.
Don’t know how anyone with grading knowledge could say that is BU.
Of course selling it would depend on what you are asking for it.

I don’t know of a website but there is a catalogue that has all the info you need.
“Canadian Government Paper Money” by Charlton. There is also lots of other info
included that may help.

Could be struck through grease.
Not uncommon and adds no value.

Thanks for the second picture, now we can identify the error. As Bill stated, it is an off centre strike.
Errors are hard to evaluate as everyone is different but I would guess it may be worth about $10.00.

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Please show a photo of the reverse so we know which error it is. This should always be done with every listing.
Also banknotes are printed, coins are struck.

I’m sure there are others but the biggest I believe is Calgary Coin Gallery.
Being from Ontario, I’m not familiar with any others.

There are other accepted graders as well such as ANACS, ICG, CCCS and ICCS. As far as selling them , it depends on where you want to sell them . You can’t sell them on eBay as they are not an accepted grader but you can sell to a coin shop, individuals , etc. as it would then be there responsibility...

@coinguy - I understand that the grading may very well be over graded by some degree but there surely must be some good value here? There is still value, what I am saying is that they are probably all overgraded which third party slabbers tend to do and one is even misatributed. The 1880S PL MS65+ ...

First, it is not an error coin. 1982 was a transition year so the first of the year all coins were copper
until they switched over to copper plated zinc coins. There would be millions of each minted.
I would grade yours at AU 50.

All of those graders are known as 3rd tier graders so don’t put too much stock in the grades.
Also unless it is the photo, at least one looks counterfeit.
Could you please take a closeup of the PCI MS 66 dollar.

If it is only on one side, it is called a Misaligned Die.
There has to be part of the lettering or numbers missing to have any value.
Really need a picture to say for sure.

Not really out of alignment enough to add any value.
Should be at least 90 degrees and preferably 180 degrees to add value.
The best way to show both sides on a photo is in front of a mirror
where you can see both sides at once.