An option to repost an Ad will become available a few days before an Ad is set to expire. Reposting an Ad extends its life by another period, and brings the Ad back to the top of its category. So you could keep an Ad on Kijiji indefinitely, as long as it is reposted every time it is about to expire.

If you would like to repost your Ad to the top of the list before the 60 day period is up, consider paying to bump up your ad.