Hello: I am looking to purchase a used Ruger Single Six w/ both the 22 LR and 22WMR cylinders. I've been looking on Gunbroker to learn what the market ( price/condition/ availability) is . I have 2 Rugers, a Security Six and a Speed Six and they are my 2 favorite woods carry pistols. I see the Single Sixes come in various barrel lengths, the most common appears to be the 5.5 inch which is fine for me. Any suggestions about what to look/ stay away from for would greatly appreciated. I've purchased several revolvers, including my Security Six, on Gunbroker so I understand it's the open market on the Internet, Buyer Be Informed. Thank you for your time and expertise.