Hi,
The 686-3 is a great revolver. I had a 686-3 4 inch and I always liked the trigger and the fact it could handle just about any factory 357 round. Sadly, I traded it straight up for a S&W 5903. In California a pre-lock 686 is going for $600 to $650. People out in my area would rather pay $600 for a 586/686 than $700 to $725 for the new ones with the internal lock.
Anything under $550 would be a sold in my book.

Good luck,
Howard