I don't know what it's worth or your time line for selling, but I would consider listing it on the Smith & Wesson forum. S&Ws seem to go for higher amounts there than other places. Here are some examples of listings for the blued version of that gun.

http://smith-wessonforum.com/guns-sale-trade/165712-s-w-mdl-24-3-lew-horton-3-44spl.html

http://smith-wessonforum.com/guns-sale-trade/163000-wts-wtt-24-3-lew-horton-spf.html

http://smith-wessonforum.com/guns-sale-trade/134481-wts-lew-horton-model-24-3-3-combats.html

http://smith-wessonforum.com/guns-sale-trade/113393-model-24-3-3-lew-horton-dfw.html

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