Your 586 is the earliest variation and having one in nickel is IMO a positive. Just guessing but probably only about 10% or less were produced in nickel. Having the original box, documents and tools is another positive that adds value. However, the six inch barrel is not as desirable as the shorter lengths. What is the condition? If you can post some pics it would be very helpful in determining a range of value.
BTW, the 586, 581, 686, 681 no dash guns were and are under a S&W recall. I recently send my 686 no dash back to the factory for the recall work which is done free of charge. When the recall work is completed they stamp an M between the model number and the serial. You can do a search here or Google and learn all about this recall.