CCM Mustang 442

I found my old bike at my mother's house last year. I got it when I was around ten years old, so it's probably from 1970 or 1971. It's a red 442 Mustang type bicycle. I stopped using it when I was around 13, hung it in my mother's garage and it's been there since. Everything is original, tires and all, and in excellent shape, since I didn't ride it that much. I enclose a picture below.

Anybody have an idea on what it might be worth?

Thank you in advance!