That sn is c.1982 and is probably a Model 581.
No
Check the butt and crane area of the frame.
50-500 USD or so
Value depends on conditon, barrel length, box, manual, finish, accessories, etc.. Price range 200-400
Model 581.
Value of a smith and western model 581 357 magnum crome with 6 inch bull barrel
"1000000000000000000000 FPS it is sweet"? Morons have to much free time From what I can tell it is about 290 FPS. It looks a decent gun for the price. If you like this gun check out the Smith & Wesson M3000 Airsoft Shotgun.
About $250 if it is in good shape.
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
$50 to $300 depending on condition and demand.