Hi Detective Callahan:
Welcome to the Forum.
A few comments and suggestions regarding some of the things you mentioned in your threads:
#6: Also there is bluing or marking on the cylinder where it touches the barrel.
If you're referring to your 2nd (middle) photo, what you are seeing are the carbon deposits (aka carbon rings) that result from firing the revolver. Some people like to remove them from the face of the cylinder, but I chose not to do so. Instead, I will lightly brush the face of the cylinder with an old toothbrush loaded with gunpowder solvent, and then brush that off with an old rag.
#17: I don’t buy my guns for the resell value, but don’t want to spend way too much on any of them.
What might be helpful is to do searches here for the rough market values of whatever firearm you're hoping to purchase in the future. Of course, actual sales prices are good references, but with all of the variables involved in assessing a used firearm for purchase, I find it handy to have a few generalizations to help me. As an example, for S&W J-frame revolvers, assuming they are in good condition, I ballpark them from $300.00 to $500.00. I'm not a collector, so the box, documents, etc. don't mean much to me, and I won't pay extra for them - I also wouldn't turn them down if the seller offers them to me. For S&W K-frame revolvers, generally, the longer the barrel, the lower the price.
#19: It actually seems a little loose and gets in the way of a speed loader. Will probably get it looked because of that and it seems a little stiff when opening.
Speed loaders and J-frames are usually a difficult proposition - there just isn't a whole lot of room to work with there. A lot of people, myself included, use speed strips instead of speed loaders as the speed strips are easier to carry (flat vs round), and easier and faster to load with. You can also just resort to the infamous "New York reload" - drawing a second, loaded handgun when the first one needs to be reloaded - which is what I do whenever I'm able to. Also, it sounds like your Model 36 could stand a good detailed cleaning and oiling. I'd seek a local gunsmith for his/her advice and services. This shouldn't cost much to do and I think you'll see the benefits.
Good luck,
Dave