I see a lot more guns for sale on the local internet gun board, but the prices are ridiculous. Guns being offered for far more than any reasonable value. I'm talking about used guns for more that certain LGSs sell them for new.
There is a big box chain that has been selling the Savage Axis for $279-$289 off and on for the last couple of months and somebody today has one used for $300. The gun store who's range I frequent was selling the Ruger American for $349 and somebody has one as new in the box" for $375.
Now I know some people go to Gander Mountain or Bass Pro and pay whatever without shopping but used guns are generally worth less than when they were new.
Most of the guns don't seem to move and just keep getting bumped back to the top of the list.
Depending on various state laws, private party sales often don't require a background check, any sort of federal form, or even a bill of sale.
There are buyers out there who are quite happy to purchase guns that are totally untraceable to them, so that could explain why there might be people willing to pay higher than retail even for a used gun.