With prices going like crazy, you might not want to spend too much on a camera that will end up being unusable. The Canon AE-1 is reliable so there are not a lot of things to be carful about.

Timestamps

00:00 Intro
00:40 The battery you will need
01:29 Issues with the battery compartment
01:50 Quick test of the shutter
02:42 Testing the light meter
03:50 Checking the lens (Aperture and cleanliness)
04:50 Appearence and overall condition of the camera
05:11 Conclusion