For 10 BTC I can fly to Poland and check them out, but being there or not will not prove the existence of the product.
The largest street in Warsaw extends all the way to the next town, through several other towns first to boot.
Here's a turn story. My grandparents and dad had to cross that big-ass street during WWII when they walked (literally) from Lithuania to Belgium to get away from the Nazis.
I'll give you 10 BTC to drive to Poland and check them out!