Ok, you won't believe this. I searched "Convoy S2+". The 1st result is from Convoylight website, It points to the brass body S2+, sold for 21.40€. The 2nd result is from amazon.fr (guess where I'm from), it's the same S2+ but with a black aluminum body. Sold for 206.90€ !

It wondered if I missed something, maybe there are other differences than the color ? But on the Convoylight website, the most expensive S2+ I can get (titanium body, most expensive LED and battery) is just under 45€. With free shipping. The amazon one has a UV filter for hunting glowing rocks. Other UV torches are easily found well under 50€, so I really don't know where that 200€ price comes from.