The price is in CDN dollars, so it's not too bad price-wise. A few more working options would make it more desirable. The interior shot makes it look weathered and dirty inside, that doesn't help its chances. If the seller wants top dollar, he should invest in a detailing.
It's not a 68-69, it's a 66 black convertible that you may like? https://www.kijiji.ca/v-classic-cars/kitchener-waterloo/1966-buick-skylark-convertible/1492827856