I'm sure they are trying to figure out how to tax private sales on items that have already been taxed once or twice. Look at the tax on used vehicles every time one is sold bammo sales tax. It's quite the mafioso syndicate.
A lot of States are desperate for cash. Illinois lost a record number of resident in 2018, 45,000 people 5th straight year in population decline. That's like losing a city the size of Rockford in 2018. The state also has a pension shortfall of 134 billion dollars. They are now using close 50% of the states general fund(taxes collected) to pay out current state pensioners. Companies like Caterpillar are leaving and other are following suit if they can.