Re: 2nd generation Colt SAA .357
Your Colt is called "mid-range 2nd generation" which included serial numbers from 39000SA to 70055SA." Since it is in .357 caliber, it is the most common, so that brings the value down somewhat. Also, the fact that it has been fired results in another reduction in value. As long as all the finish is there, it is worth approximately $950. Since you have the original box, that adds about $200 in value, so you should expect to get about $1150 for the pistol. Actually, it will be a hard sell to a collector, as they are primarily interested in mint, unfired guns, so it will probably be of more interest to a beginning collector.