I have bad experiences with mister-auto and many german part web shops.
Recently i ordered a radiator from mister-auto. Website says that it was in stock. It turned out it was not in stock.

But i have to say that i got my money back quickly without much hassle.
Some time ago i was looking for a steering rack. It was listed on many german web shops. All these web shops says it was in stock, and inmediatly available. But after ordering and paying, it turned out the part was not available. Getting my money back was a pain. I had to start a pay pal claim to get my money back.
I emailed all the other web shops who its website says it is in stock. Some webshops did answer, some not.
The website who didn't answer, i ordered the part without paying, to force them to tell me the part is in stock or not.
It turned out no webshop could get me the steering rack.
Some days later i looked again, and all those website were still saying it is in stock

I learned not to thrust the statement "in stock", and make contact to double check.