ajbpsu: You have a .38 Safety Hammerless 4th Model, dating from between 1898 & 1907. Serial number range was 116003 to roughly 220000.
According to the Standard Catalog of S&W this gun in excellent to excellent+ condition was worth $400-$500 in 2006. I suggest you look on
www.gunbroker.com ,
www.auctionarms.com ,
www.armsbid.com and
www.gunsamerica.com to get a feel for current pricing.