@Mira635
You have these deals activated currently on your listing;
Special offer: 20% off this home
This host is offering a one-time deal to the first 3 guests who book a trip between now and Jun 22
This host offers 25% off if you stay a week and a 55% monthly discount
The deals stack up so that explains the low monthly price.
You should go back in to the pricing section by your calendar to have a rethink. These discounts seem pretty substantial.
If you search for your listing and play around with various booking lengths, you will see what guests will pay.