Airbnb got heavily restricted in central paris so most of what you see listed is either illegal or way overpriced. Lots of hosts moved to booking.com or local sites instead.

If youre staying longer than 4 nights look at apart hotels like adagio or citadines. Similar price to airbnb but actually legal and you get proper cleaning/towels. Plus they dont randomly cancel on you three days before arrival.

Short term rentals under 4 nights are still allowed but the good ones get booked months ahead. Just saying dont count on finding a cheap apartment rental last minute anymore.