Right now Cabela's has the similar looking nickel/gold engraved Pietta 1860 Army on sale for $279 which is the same plated brass frame revolver that has been offered for years.
Cabela's also offers the similar Pietta 1851 nickel/gold with a white grip at the regular price of $349.
The main difference between these plated Colts and the nickel/gold Remingtons above is due to being a 1 of 5000 limited edition and not being a regular production item.
So maybe these Remingtons would be valued a little higher than the regular prices for the nickel/gold Colts. But I think that it would be very difficult to find a buyer willing to pay much more than $50 over that price for each of them.