I think buying a tourist Koummya is a rite of passage for all new collectors.
There's so many on ebay. I posted a picture of my three, yours at least is much nicer and I assume older.
The lesson I learned from buying these is to pay more attention to the quality of the blade than the quality of the sheath and hilt. If it doesn't look like much effort was made into shaping and "finishing" the blade, then the blade was probably never meant to be seen. IE it's a wall hanger or decorative piece.
When it comes time to buy a real Koummya I'll probably go with a trusted seller rather than auction. There's just too many tourist models floating around.