I went to his shop before. He is mostly not there, I think his father is the boss (a man in his late 50s or early 60s). They do not sell grey sets. Only local warranty set, so I think quite safe.
Best part, you already know the price before going down, safe you time and trouble to bargain

Quite a friendly man though, the one whom I met. Never bought anything there cos they do not have what I want.