1981 P Jefferson Nickel

Considerable Die Deterioration on that nickel, evidenced by the metal movement in the fields. That phenomenon is often called orange peel texture.

https://www.error-ref.com/?s=Orange+peel

There is nothing particularly valuable about a filled mint mark. People post those on ebay all the time as if it is something rare and precious, but it's quite common on 1970s and 1980s coins. Sometimes the filled mint mark is caused by a broken post on the die, because that little spike of metal gets crushed quickly when minting coins. Other times, die wear just smooths out the post, or circulation wear smooths over the tiny hole on the coin.

I know devices touching the rim can increase the value of off center strikes and misaligned die strikes. I don't know if the value increases when the touching is caused by Die Deterioration.

An example of a worn out die. Keep for reference.

filled MM has no value but people still list them on ebay hoping to reel someone in that do'snt know any better

From Die Deterioration on a nickel - just a spender.