Nice revolver, pricing commemoratives/special editions is always difficult, some bring signficantly more than a stock gun and others don't, interest and demand vary by region (conventional wisdom would have it that your revolver would be most sought after in LA) but your 19 has what collectors want, all the boxes/papers/etc. and it appears to be mint from the photos.
I've seen other boxed, mint commemoratives go for upwards of $2000.00 at auction, and the SCSW reports a Tex Ranger 19 commemorative set going for $3150 in Dec, 2005. If you really want max. return I'd consider assigning it to one of the national auction houses; i.e. Rock Island Auction, Jum Supica's Old Town Station, etc. Or you could try one of the online auction services.
The SCSW indicates you revolver retailed for $350 in 1981, production was limited to 1981 units, and it is C&R. Hope that helps, you've got a nice and desirable investment there, and good luck with your sale.