Years ago they suddenly had frozen my account of my onlineshop.... strange thing is that they did this after I had more than 3000$ on my account there.... I lost all that money and have zero chance to receive it! I still had a lot of luck because this were just download videos where I earned the money with. But I can imagine how hard this must be for a electronic dealer who still have to pay the bills to the wholesaler.

Yep, I've heard so many similar stories. The only solution is to make sure that you transfer funds at the end of each day. Never let Paypal keep enough to do you damage.

The main problem have dealer who sell camcorders via PayPal... Just imagine somebody buy an Ex3 and hours after the transaction your account is closed. So you have to ship the camcorder to your customer but will never see the money for it.

But dealers have no chance. When they don't offer PayPal, people can not understand why, because PayPal is such a "trustable" company.

If yu do get your money frozen with Paypal, they don't "just keep it". that would be theft. What they do is hold onto it for a 6 month period before returing it to you via your bank or credit card. they hold it for that long to make sure there will be no charge backs from customers.

if you haven't received the money owing you can chase them and go to the police to report a theft.

Sorry but this is not theft in legal terms. Let your lawyer contact des Bundesamt für Bankenaufsicht, PP being a "bank" now in Europe, this would be the first contact.
You can also sue them based on §812 BGB (ungerechtfertigte Bereicherung) u.a.
Banks have to transfer money in due time. Six months exceeds that timeframe by far.

Swen, for what reason can they close it? There must be AGBs (general business rules). What do they say to that case?

PS. PP is no trading company. They are a clearing house. Very different.