Looking at Armslist, I think what I see is the emotional value lagging the drop in market value. Let me explain:
Joe Schmoe, along with half the population, was worried that he wouldn't be able to buy an AR/.357/Tactical Tupperware/1911/LoudenBoomer after Hillary won, so he paid 30-50% more than the same item was worth pre-Obama. Now that Hillary's history, no one is worried about that, so demand has dropped by 50%. Joe wants a 4-wheeler so he decides to sell the gun. Unfortunately for Joe, he still remembers what he paid for it and it feels awful to consider that he won't be able to get the money back!
So Joe lists the gun on Armslist (or at the Gunshow) for $50 more than it costs new at Academy on sale this week, because he 'feels' that it should be worth what he payed for it.
I figure in a couple years, after everyone forgets (or gains some emotional distance from) what they paid for their impulse buys during the banic, used market prices will drop to 10-25% below new prices and it will once again be worth buying used.