He has got some very nice gear there - seen a Canon 50mm 0.95, Nocti and lots of medium format.
He definitely charges a premium - but is knowledgeable - for example when I was looking for M42 to Nikon adapter, he pointed out why one was better than the other due to locking screw. There are always a few people hanging around too but very friendly atmosphere.
The prices seem fluid. I almost bought a Nikon Noct there - looked mint in box but the price seemed to increase because I was interested. Lots of Nikon AIs as are the other shops in Champagne court.
There are many other shops all over HKG - many with very rare lenses but not cheap at all. Most of theses are pretty reputable and not at all like the shops on the main shopping drags (Nathan Rd) who are notorious bait and switchers.
If any one needs any recommendations, let me know
JJ