Hey, I'm in Canada too, and I've bought and sold a few cars privately in the last few years.
Places to list it:
autotrader.ca
Older folks, like my Dad, only shop for used vehicles this way. Online is free, and the printed autotrader is decently cheap, like $8 or something. (I don't know how many times he's bought an auto trader magazine, just to browse).
Facebook Marketplace. Also free, and who doesn't go on Facebook?
Craigslist. Also free. And in BC, it seems to be what people use, instead of kijiji.
A lot of university newspapers run free classifieds, and at that price, it might be just the kind of car that a student would like to buy.
Take pictures of the damage too, and put it in the ads. There is no point in wasting your time with people who are going to freak out over a little rust. I'd spend the $60 and the time to fix the AC. You never know what might tilt the balance for someone doing their math on the car. That AC repair might mean $400 to them.
Caution: total side-tracking story ahead...
We once got a smoking good deal on a lower milage 7 year old echo 4 door sedan. The car was worth $4000 to the seller, and to us. We were going to offer her that, when I saw the ad, and recognized her name (she was an old co-worker of mine) but she mentioned that the car wasn't available for purchase for 4 weeks from then. Upon talking to her, it had been the victim in a hit and run accident in a parking lot, that caved in the front side panel, and cracked a headlight. She didn't have collision insurance on it, and so had saved the $1800 to have it fixed at a dealership (they had talked her into repainting the whole front end, as well as replacing both headlights, so they would be the same new colour plastic) and was waiting for the appointment.
When my husband, my mechanic Dad, and I went to look at the car, my Dad laughed at the damage, and said he could fix it for about $400 in parts (and he'd do it for free because he is awesome). We talked to her about it, and she agreed to let us have it ASAP, for the difference between the $4000 value, and the $1800 she'd saved up to have it fixed, since she was only going to net $2200 selling it to anyone else (she'd been trying to sell it for a while, and was getting frustrated by the process).
So, with an aftermarket front panel, painted close enough to the same colour as to not stand out, and one new headlight, we were off to the races, for about $2600. When I changed jobs a few months later, and I needed a work vehicle, we sold it for $4000 :)
Anyway, the point of my story is that the trouble for someone else to get the AC fixed, along with the cost, should make YOU want to fix it, since the ROI is pretty fantastic for $60 and a few hours of spare time.