Yeah, I also ignore the "rare", "hard to find", "basically new" and all the other BS people use to try and sell their guns. If you haven't put in a picture, it would take a really exceptional gun that sounds like exactly what I want for me to even bother contacting a seller. There are a couple on the EE right now...a Browning .22 semi-auto comes to mind...that have no pics and despite a very competitive price they are still sitting there after a number of BTT's. Those same sellers never seem to provide pics, and their ads often stagnate for a long time. Might be a lesson to learn here...
But I completely agree that the time it takes to sell something varies widely depending upon how unusual or "niche" it is. If you are selling some oddball item that has a very limited market, it might take some time to move it regardless of the price.
If I'm trying to sell a typical mainstream budget gun...Ruger American, Savage Axis, etc...I like to price it at the bottom end of what similar rifles are listed at on the EE. I'll gladly give up $50 or so to sell right now rather than monitoring an ad for weeks...but I've got no patience for the guys who simply cannot pay asking price regardless of how low that may be. If I have a gun that's $1000 new...and there are a couple others listed for $850...I might price at $800 or $750. I want to sell it...that's why it's listed...but guys who are constitutionally incapable of just saying "I'll take it!" often won't even get a response from me.
If you don't hear back after trying to lowball me...well, it's not because you're on my Ignore list; I don't have one. It probably means that you just sound like too much of a PITA to deal with.
I'm still chuckling about the guy who made me an insane lowball offer on a beautiful 9.3x74R double rifle I had listed once. I forget what the offer was but it was something like 50% of my already very competitive price; he explained that it would be a "truck gun" for him...I explained that no, it wouldn't...