Home owner's insurance question

What if you bought a used piece? Say I got a pair of speakers for $5,000 that were originally $15,000. Would the insurance company have to get me the same, or equivalent up to $15,000?

My father told me, "Your insurance policy is only as good as your insurance agent." 

You've received a lot of good advice from experienced people here but my experience has been that, regardless of what the fine print in your policy says, if you have an agent who's willing to help you take every advantage of what's available you'll come out ahead, sometimes way ahead. 

I've had only three major claims in my life. In those cases my close, face to face relationship with my agent got me considerably more compensation than I likely would have without that personal relationship. My policies may have been priced a little higher than the cheapest I could have bought but they turned out to have been real bargains.

@cleeds As I wrote, every insurance policy has exclusions, auto, property, life, personal article floaters, boat, etc. etc. "All risk" is a term that is used to differentiate from a named peril policy.

@koestner If the speaker is no longer in production, its replacement cost would be the current market price or actual cash value.

If the speaker is still in production and has a replacement cost of $15,000, the policy would cover the cost of replacement. However, the insurance company has the option of replacing it themselves at their cost. Sometimes they can acquire the item for less than retail. If you choose to buy a more expensive speaker, you can only collect up to the RC value of your claimed speaker. Keep in mind, I am referencing the most common Homeowners Policy known in most states as a HO-3 policy. Best to check with your company or agent.

Is it true most insurances will cover a "Zombie apocalypse?"...:-)

I have been thinking about the same insurance question since i have revamped both of my systems and continue to add to them. Question is, i have renters insurance only and was told my the issuer that it is capped at 5,000, is there no recourse such as adding or just hunting out an insurer that will increase the coverage?