This is the right sub forum to ask on, it's just things have been slow on this site. I wouldn't want to even guess at the guns value, other than to say that long barrels like the one shown have limited general appeal, with shorter barreled revolvers being more popular in general, and hence bringing more $ for examples of the same model. Is there a Freedom Arms Forum you can check in with? I might also go on Gun Broker and see what completed auctions for guns like that were bringing.
Unless you really want a 10 inch barrel, figure maybe $200 for a gunsmith to cut, crown, and re-mount the front sight, plus you might need a different height front sight with the shorter barrel. That would also hurt any future collectors interest, unless, maybe, it was done by FA with an accompanying letter that was kept with the gun.
Larry