Anything I should know about? I used to have a nice Security Six I sold and now wish I hadn't. So, I'm thinking about replacing that with a GP 100 in .357 w/4.2" barrel. I prefer blued guns, so I know I will need to do some looking. I'm asking to find out if there is anything I need to watch out for in buying a used one. They are supposed to be nearly indestructible, so shouldn't be an issue buying a used one?