I am without a price guide at the moment and need to know what a used but in like new condition smith & Wesson 620 .357 7 shot 4 inch barrel with rubber grips is worth. I Might be involved in a trade and need a price, he put a price of at least $600 on the gun but I am not so sure. Could someone who has an up to date value guide book around let me know what this thing is worth or point me to somewhere to check??? THANK YOU FOR YOUR HELP