I have the chance to trade for a couple of Blackhawk 50th anniversary models both blue steel. One is a 44 mag. , the other is a .357 mag. The .44 has a 7-1/2 inch barrel and the .357 has a 4/5/8 inch barrel (I didn't measure them to be sure of length). Any way they are new in the box. What is a good ball park amount that these are worth. Thank You.