Impossible to answer without a DETAILED description of ALL markings, barrel length, caliber/gauge, box, papers, accessories, sights, stock material, overall condition, etc..
Impossible to value with just a serial number.
Between $50 and $200, depending on exact model and condition. Modern reproduction.
According to a 2004 standard catalog of firearms, it is worth anything from $100 to $1000 dollars depending on make & model and condition .
Impossible to answer without pictures
There's SOME info here; http://www.scripophily.net/hoalarcoma19.html FriPilot