From the dealings I have had with Luckyy. He will not respond to PM's. He even says that on his ad in RWI. Only emails. I think the main reason he does not want newcomers to ask him for a watch is that his communication is lacking for some. Therefore when newcomers start getting worried after having paid WU for a watch, they start bombarding him with emails demanding tracking info and such. If you are that type, I say think before you pull the trigger, or you might end up with more white hairs than you started out with. As for my experiences with him, he has been always polite and responsive, but not very rapid in his responses. Which is OK for me since he is more of a collector who has access to these grail watches, and is not a full time dealer. But as in all things in life YMMV.
Eddy