The cameras or the lenses? The cameras are more a curiosity unless they are the high high end ones. And even then, not much. The lenses might be worth something if they are good ones, but honestly, Canon is not "known" for its optics. (And that's not a Nikon vs Canon comment, it's just fact.) Nikkor lenses (the brand name for Nikon lenses) have long standing quality recognition, even for lenses 20 and 30 years old. And even with Nikkor lenses, the best "classics" are less than $100 unless they are the big ones.
Send me the lens info in a PM and I can give you an idea, but unless they are something really good, you're probably looking at under $100 as well. Honestly, unless you have a huge need for $100, I'd keep them because you can not replace them for that money. Well, that is if you have a Canon camera that the lenses will mount to, if not, they are just gathering dust anyway.
Inside me is a thin woman trying to get out. I usually shut the bitch up with a martini.