How much can a boxed CANON AE-1 sell for?

My grandfather bought it new back in the days when film was the main biz. He never used it because he was more of a Pentax and Nikon guy. How much can it fetch?

Not as much as might be expected unless you find a collector.

Sadly Canon cameras like the AE-1 suffer from not being able to use current Canon lenses (EF). When Canon moved to the EOS cameras and EF lenses, the older Canon cameras became nearly obsolete as well as the FD and FL lenses. I know because I was stuck with four Canon F-1/New F-1 cameras and ten lenses.

I moved back to Nikon at that time and to this day still use a Nikon system (some of my old Nikkor AI lenses from the 1970's work just fine on my Nikon D300 and D800e cameras)

You can check with KEH.com and see what they will give you for the camera (and lenses?) and go from there $100? For a collector of Canon cameras then it is worth whatever they will pay. When I bought my AE-1 in 1977 it cost me £200 (around $300). If it really is unused then that is the max it will fetch but you would need to find the right buyer.
Selling it to someone who just wants to shoot film then it is worth around £50 or $70 In the late1970s that camera sold new in Britain for about £150 ($250 at present exchange rate) It was quite an innovation when first released. But that was nearly 40 years ago, when film was the only thing, and digital photography was not even thought of except by people with a very far-seeing vision of what might be practical 20 years or more in the future.

So now the value of an AE1 in working condition depends on finding somebody who wants or needs a film-based camera of good brand, and who might ignore later models by Canon and other good brands. Or a collector, if it is really pristine. It depends on not only the camera but also the box! If both are in absolutely mint condition then you would need to find a specialist camera auction. It would also help it the serial number is low!

$100?

For a collector of Canon cameras then it is worth whatever they will pay. When I bought my AE-1 in 1977 it cost me £200 (around $300). If it really is unused then that is the max it will fetch but you would need to find the right buyer.
Selling it to someone who just wants to shoot film then it is worth around £50 or $70

In the late1970s that camera sold new in Britain for about £150 ($250 at present exchange rate) It was quite an innovation when first released. But that was nearly 40 years ago, when film was the only thing, and digital photography was not even thought of except by people with a very far-seeing vision of what might be practical 20 years or more in the future.

So now the value of an AE1 in working condition depends on finding somebody who wants or needs a film-based camera of good brand, and who might ignore later models by Canon and other good brands. Or a collector, if it is really pristine.

It depends on not only the camera but also the box! If both are in absolutely mint condition then you would need to find a specialist camera auction. It would also help it the serial number is low!