The 581 was made from 1967 to 1983, you can determine the month/year of manufacture by the date code on the barrel. The table for this is on the Remington Society of America.
http://www.remingtonsociety.com/rsa/questions/barrelcodes
About $250 if it is in good shape.
357 Magnum
3-6. The 3 planet model would have gliese 581 b too hot, gliese 581 c in the habitable zone, and gliese 581 d too cold. The 6 planet model would have gliese 581 e, b, and c too hot, gliese 581 g and d in the habitable zone, and gliese 581 f too cold.
Not without modifications
Model 581.
Passions - 1999 1-581 was released on: USA: 15 October 2001
The Bold and the Beautiful - 1987 1-581 was released on: USA: 1989
$50 to $300 depending on condition and demand.
That sn is c.1982 and is probably a Model 581.
Ryan's Hope - 1975 1-581 was released on: USA: 3 October 1977
Santa Barbara - 1984 1-581 was released on: USA: 7 November 1986
Days of Our Lives - 1965 1-581 was released on: USA: 22 February 1968