The owner of that store is a tibetologist from Germany. I know him from seeing and I'm sure he is 100% reliable and honest. If you buy from him you help him finance his studies and his work on his Ph.D.
Now you can say that I've grown bitter but of this you may be sure
The rich have got their channels in the bedrooms of the poor
And there's a mighty judgement coming, but I may be wrong
You see, you hear these funny voices
In the Tower of Song