This highly desirable camera is a great little rangefinder camera. I bought mine about 5 years ago at a resale shop for $10. If you go to Steven Gandy's Cameraquest site, you'll find a bunch of information about it. (http://www.cameraquest.com/canql17.htm). I replaced the foam seals in mine after I first acquired it, installed a mercury battery, and the camera has worked flawlessly ever since. If the battery goes I could still use it fully manually; otherwise it's a shutter-priority auto exposure system. With its matched flash - Canolite D, the camera does really well with flash exposure.
My camera is pictured with its series VI filter holder and a yellow filter.
Should you find one of these for sale, pick it up. If you have been shooting with digital for a while, you might have forgotten the instant response of a film camera.