I assume you mean a used one. Well it depends on condition, and model (blued or stainless). It is a very widely distributed pistol which may hurt its resale value as they are pretty much everywhere. I have one and I love it, will never sell it. You could expect to get maybe $225-$300 depending on model and condition. Good luck
350 USD
You will have to contact Ruger
It hasn't been since at least 2003
$250-$400, depending on condition and finish.
You can request an owner's manual from Ruger. You can go to a gunsmith and ask for help also.
For a definitive answer, you will need to check with Ruger customer service. You can do so through their website.
Neither. "Better" depends on what you think, not someone else.
It all depends on the model, caliber and condition of the Ruger. If I asked what is the price of a used Chevy you would probably ask. Which one, how old, what condition, Which engine. How many miles? It's the same with a used Ruger.
Both are fine weapons. What will make it "better" for you is subjective. If you want an opinion, I personally would go with the Ruger because it's caliber is .45acp, plus, Ruger has a reputation for building their weapons like tanks.
Part failure/out of spec. Get it to a qualified gun smith ASAP.
There is no such Ruger.
Well, neither one is particularly great, but, personally, I'd take the Ruger over the Kel-Tec anyday. As for the Crimson Trace laser.. couldn't tell you. It's really a useless accessory.