$10,547 its rare
These were heavily mass produced. They are not rare and not terribly high value.
it has no value and is by far the most rare
It's not rare
There is a website called Heritage Auctions that could be a useful resource when trying to determine the value of a rare coin. There is a search box on the site where one can input the information from their coin and find out the value.
How rare? Which denomination?
It probably doesnt add value or much value other than an interest by a collector.
$.25, 1980s quarters are not rare in the least.
$35,000.00 to $81,000.00
NO, cleaning them will probably reduce their value
You have a rare Capped Bust Dime - if it is in good condition (G$), its value is: $35.00.
Since this bill is not rare and is circulated it is worth face value.