What it really comes down to is Condition-Condition-Condition!
It's fairly common to see a high-condition Trojan sell for $2000.00 or more and then assume their well-used & loved gun will bring the same money.
Then there are the sellers on a fishing expedition looking for an uninformed fish to bite, while their gun constantly gets relisted time & again for months or sometime years.
I've never understood the logic of pricing something so high that it's constantly for-sale rather than sold