Needs to be checked over by a gunsmith.
Does it look like this http://en.wikipedia.org/wiki/Sauer_38H? Without more info the best guess on value would be 100-500.
Try gunshops, pawn shops, estate sales, garage sales, want ads, for sale ads, gun shows, e-gunparts.com
50-300 usd
50-200 USD or so
100-250 or so
10-200 USD or so
10-200 USD or so
$250 - $300.00 US dollars depending on the condition.
50-500 USD or so depending on specifics
Try e-gunparts.com
Quite a few.