@PM2
Not at all. We have an old wire transfer system here in Germany which is well known by any user and it's working fine for many years. But it will be hard to get it if you are outsite of .de. If you like, talk to the guys from
http://www.libereco.net they can give you information regarding the different payment systems for German users.
Also, you can have several other payment systems, like SMS, Prepaid, Credit Card etc.