If you don't know how to estimate the sale or trade-in value of your used firearm, here are some quick tips
Do you want to sell your gun trader it in, but don't want to be robbed? Unfortunately, there is no single system for determining its value. You are alone. However, that doesn't mean there aren't resources that can help you. Just because it's used doesn't mean you may not be able to maximize a gun's sale value. Here is the guide developed by our US friend Brady Kirkpatrick , owner of the GunMade.com site . An enthusiastic gun and hunting enthusiast originally from the Midwestern United States.

If you are selling your used firearm

Always remember that a used firearm is really used. Not only do you need to be honest with yourself about its condition , but you also need to remember that people entering the used gun market are likely buying used to save money.
Manufacturer and model , of course, form the main research criterion for knowing how much you could get for your sale.
The buyer may not care about the scratch, because they know they are getting a discounted price. So if he's still willing to buy it, it's only because the scratch doesn't affect the gun's performance. The condition of the firearm has a lot to do with its value, not because it makes it worse, but simply because it is no longer as good as new, although it may perform even better than before.
You might also consider the season or how popular your sale might be. You won't get a great selling price if the market is already flooded with your particular model. However, you'll get a great price on something that's highly desirable, rare, or in demand .
Are you selling your handgun with ammo, holsters, sights, optics, add-ons, aftermarket gadgets, or anything else that might increase its value? Back then, you could potentially expect to get more for your trade. However, it also depends on the type, condition and palatability of the accessories.

Just like anything else 

Weapons depreciate over time . You can't expect to get much more than 50% of its original retail value. Again, it will depend on all other factors at play.
A weapon is an asset that can be used for a purpose, most of the time. However, if you intend to sell an antique firearm, the "batch" is entirely different. Weapons depreciate, but if you wait long enough and find the right buyer, they become valuable again.
An antique rifle will be worth much more today than it was when it was originally purchased, while a gun that is only five or ten years old will likely be worth much less.

There are many ways to sell your weapon

You can sell it to a private individual, directly or using a website, or you can sell it to a gun shop . At the armory you can also offer it on consignment, resigning yourself to waiting.
First, get rid of sentimental value. The person at the gun shop will always offer you much less than what you want. He is there to make money. The reality is, when you're handguns for sale you'll probably never get a price that's high compared to what it's worth. The gun shop owner has a profit margin that he must meet and will pay less than it's worth for the gun so he can put it back on the shelf for more.