You can request an owner's manual from Ruger. You can go to a gunsmith and ask for help also.
350 USD
P95 is the model number. DC means it has a decocker.
You will have to contact Ruger
$250-$400, depending on condition and finish.
It hasn't been since at least 2003
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.
Part failure/out of spec. Get it to a qualified gun smith ASAP.
Seeing that this handgun retailed for 395.00 new,I would say that the gun will bring between 300-325 dollars in the condition that you describe.
Weak spring, bad magazine, dirt, etc..
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.