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Since you are from Germany, I would have thought that PayPal would have been one of the payment options offered to you during the sign-up procedure.
There have been a few reports of payment options being restricted for some potential customers, but I am not sure if this is deliberate, or a temporary 'glitch' in the system.
If you are using a proxy to access the Internet, you might want to try removing the proxy (if possible) for the sign-up process, just to see if you are offered PayPal as a payment option.
Your English is fine, much better than my German.
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