Just before Colt stopped making DA revolvers years ago, they made a highly polished DS with a bobbed hammer that was marketed to female shooters. COlt has never said how any were made, but many estimates say only several hundred.
I've seen them advertised from $3,000 to $4,000 USD.
Even if you found it in the blue book, it's really just a guide on discontinued Colts. To answer your question best, one simply goes to completed auctions and current bidding on gun broker. Remember a high listed price with no bids is not an accurate example of worth.