Mieten über Airbnb?

Ich suche eine Wohnung in Neu-Ulm, für einige Jahre, und bekam auf eine 
Anfrage diese Antwort:


The apartment pictures are attached!
You can rent the apartment for min. 2 months and max. 5 years but we can 
renew the contract. The apartment is fully furnished, but if you want, 
you can rent it unfurnished. The utilities costs are included.
As I told you in my first e-mail, I am  with my work right now. Before 
leaving Germany I had prearranged the deal with Airbnb Company so my 
presence isn't necessary. The keys and all needed papers are in their 
possession, ready for delivery. You will have 3 days to inspect the the 
apartment before rent it. Airbnb will start the delivery for the keys 
and the contract to you, but first you must deposit the value of 1 
rental month+deposit(500 E) will be 950 euro in their account. So if you 
want to make this deal please login to the www.Airbnb.com website, and 
after that please send me the following details:

Full name and address
Shipping address
Airbnb username

After I'll receive your details I will forward them to Airbnb and I will 
proceed the order. Airbnb will contact you with all the details that you 
need, to complete this deal. Waiting your email with the requested 
details.


Aber wie seriös ist das?