The gunsinternation.com site has a swedish m40 husquvarna (LAHTI) auto pistol unissued, appears to be new with holster and extras for $995.00. It will depend on the condition of yours but maybe that might give you a rough idea. Hope this helps a little.
50-160
Anywhere from $25 to $100.
225
50-600 usd
25-65 US dollars
25-50 US dollars
50-700 usd
$50
100-1000 depending on specifics
100-400 or so
50-200 or so
50-500 usd