Mercari is the same way, actually. On the one hand, as a seller, it's nice to not have to "renew" and "repost" as I have to on Craigslist. I've had one listing on Mercari for 6 months now.
But, as a buyer, it can be confusing, because you wonder if the item is really available or not, and I've hesitated to contact sellers because I assume the listing is just old and forgotten.