I am looking at a 659 this weekend. I will inspect and fire some rounds. I have a few questions. One, is there anything I should look for specifically? Two, how will I know the year manufactured? And finally, can I run the serial number somewhere with S&W for more information? The seller is including an extra clip, it comes in a leather pouch. He is asking $600. From the earlier posts, this seems high. I appreciate any feedback! Thanks.