Doing business in Illinois would be much more difficult- and expensive. 

Via Pantagaph: 

A bipartisan package of gun measures aimed at tackling illegal trafficking and requiring state-level certification of gun dealers emerged Tuesday from the ashes of failed attempts to license gun dealers.

The legislation -- attached as an amendment to Senate Bill 337 -- would require gun dealers to certify their federal license with the state police, calls for a study of gun trafficking data and imposes a penalty on private dealers who fail to keep adequate records of private sales.

It cleared the Senate Judiciary Committee 8-3 and is now moving to the Senate floor.

Read more here.