ElizK - like Gdad said, I wouldn't expect much. AE-1s are common as can be (I even saw two in short succession on my last Disney trip) and not in high demand since you can't use those lenses on almost any other camera without some kind of wonky adapter, so you need a whole separate collection of lenses. (Well, OK, I think 4/3rds can use them with a regular adapter, but using then on an EOS body requires some fiddly extra glass in the adapter.)
I just saw one just a day or two ago on the local Craigslist for $25. The freakin' things are everywhere, like I said - we even have one here on one of our camera shelves; it came with my wife when she moved in. Fortunately, she quickly realized the error of her ways (about using Canon, not about living with me!) and it has gone untouched for many years. It's primary function now is to keep dust off a small rectangular section of the shelf.