In G-4 $6.00 to $185.00 in MS-60
a quarter
There is not always a mint mark on coins. If your coin does not have a mintmark it means that it was made at the Philadelphia mint in Pennsylvania.
No mint mark means it was minted in Philadelphia. The quarter is worth exactly 25 cents.
$3.00- $2,750.00 dollars
It is necessary to know the amount of wear and mint mark (if it has one) to be able to make an estimate of value. I would suggest you take your coin to a reliable dealer and have it appraised.
Melt? $5.80. Depending on mint mark and condition it might be worth more.
The M is not a mint mark but on every coin and is on the right side. The mint mark is to the left od the date slightly above.
YES I have one.
$20-$1,300
$4-$10 depending on condition. If mint condition around $20.
Check that coin again. Mint marks were on all quarters by 1981.
The mintmark is a "D" not a "P" and it's just a quarter.