They did that here. Found out that the money was buying better models. So, wanna update your stash??
I've also heard of people walking the line, performing "safety checks" and offering more than the blood money for worthwhile guns, say $150 or $200 in this case. Wouldn't work in IL because they don't have unregulated face-to-face sales between private owners, IIRC. Sometimes it's grandma bringing in Gramps old gun cause she's not a gun person and there's no reason for it to be under the bed anymore if she has neither the knowledge nor inclination to use it, and you can get a nice gun for cheap plus saving it from the anti-rights nanny brigade.