I would say so, they both have a wide selection of old and new.
Videogames then and now is at 4351 N Harlem Ave in Norridge just north of The HIP. A bit easier to shop here all there stuff is out for you to hold and look at. Last time I was there not too many NES games. The owner is Sean Kelly who made/makes Multi Carts for the Vectrex. They don't really have an innovatory of the games so you have to look through everything(some times they are in order but most of the time they are not).
He Also has a second much smaller shop at 963 Elmhurst Road, Des Plaines, IL
People Play games is at 3268 N Clark(just a few blocks south of Wrigley Field). Most of the games are in locked cases(in alphabetical order), so you have to ask to have them all unlocked. good selection a bit more expensive. They do have a good selection of NES games, and Sega CD games. they even have stacks of controller overlays for the Atar 5200, Colecovison, and Intelavison.
Both have just about any used system you could want.