No kidding...I second the OP, often the used ones cost more then the new ones! And not because they've been improved or have additional add ons.
I was at a local gun shop the other day, looking at used guns. Most if not all were priced higher then retail, all guns...not just AR's, revolvers etc.
I sold over 30 guns on GB last year...ya, it hurt, had to, to purchase groceries, but if you want to sell them, you have to price at what the market will pay.
I'll try some State forum's but, last time I checked. I didn't see any deals.