@Soraya94 I'm glad you got a booking finally, but it's hard to say, really, why those other places suddenly tripled in cost. Some hosts actually use a strategy when they don't want guests to book (like maybe because of coronavirus) of doubling or tripling the price, assuming no one will pay that much, because actually shutting down the listing for awhile or blocking dates can result in a much lower search ranking when a host is ready to host again. It's like sometimes guests get upset when a host says sorry, we actually aren't available for those dates (even though they show on the calendar as available), then the guests sees a few days later that the dates are blocked, so thinks the hosts just rebooked them at a higher price or was making an untrue excuse.. But the host may have blocked the dates because they had friends or family coming to stay, or have to have a medical procedure.
I'm not saying this is what happened in your case, just that you can't always jump to conclusions about why dates might be blocked or prices show differently, because there's not necesarily just one explanation.