RE: Mossberg 500 20ga slugger???
$289 is kind of high for that gun. They probably only gave the person who sold or traded it to them $150 for it.
Sounds like a nice gun, maybe go back and offer $225 for it and if you get it spend the difference to get it drilled and tapped for a scope. The cantilevers (to me) always seem to set the scope too high.
Good Hunting,
Bowflex