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.
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.
$3.00- $2,750.00 dollars
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.
$20-$1,300
YES I have one.
$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.