Condition is every thing on a guns value. A special gun that might be worth $1000's in excellent condition will be totally worthless to everybody if it's a rusty hulk regardless of what it *once* was. So whomever quotes the value really must see the gun.
That being said, the most common place to get a quote is a good gun shop where the owner looks at the gun and refers to the Blue Book (like the previous post did). Be sure to make sure exactly which type of value you're getting too. Is it a 'trade-in' price (whole sale) vs. a street (retail) price.
You can also take it to a gun show, but I don't think that's as reliable since they guy you're talking to is 'here today, gone tomorrow'. If you do that, get more than one opinion.
That being said, the most common place to get a quote is a good gun shop where the owner looks at the gun and refers to the Blue Book (like the previous post did). Be sure to make sure exactly which type of value you're getting too. Is it a 'trade-in' price (whole sale) vs. a street (retail) price.
You can also take it to a gun show, but I don't think that's as reliable since they guy you're talking to is 'here today, gone tomorrow'. If you do that, get more than one opinion.