The value depends on overall condition. It could go for anywhere between $275-1,000.
value of smith & Wesson model 5906 pistol
100-450 USD
200-800 usd
50-450 usd
100-450 usd
50-550 usd
Depending on condition, around $450-$500.
Via the screw.
check at: http://stevespages.com/page7b.htm
50-500 usd
1990
50-400 usd