@Kostas61
I did a test for 6 people from the 23rd of June till the 30th of June, the price is 3243€ for each listing.
So it is the same price.
Even if it was a different price, it is legal.
To publish many listings is legal even if it is the same place.
The risk is to get 2 bookings at the same dates and to cancel one of them.
It is also legal to publish your listing on other websites.
Some people publish the same listing with different prices because equipments are different.
Ex : sheet are provided in one case and travellers have to bring their sheet if they book the cheaper one.
@Mike-And-Jane0
A well known fraud is to use Airbnb to be contacted and then ask the prospect to pay outside the plateform.