Thank you very much my friends !
Many good advices here as always.
Jean Luc will read all this and will decide by himself what to do. I regret very much for him that he did not ask me where to buy such things in the US...
I think that calling MSS HIFI ( wow, I did not know the guy was only 29 ! I would not buy anything serious from such a young person
) and asking what's happening would be the first step. Jean Luc will have to ask for the serial numbers to check with the McIntosh factory if they are there. I suppose that this kind of service is not a priority at McIntosh so it could explain the delay...
If the guy is not able to give those numbers, I would first call the police to see if they can go see him or if they don't care, and then a civil action will come last. Unless MSS HIFI would be in bankrupt, I'm sure that Jean Luc will recover his money : USA is not exactly Ethiopia !
And Dan, I agree with you. Things were simpler in the old times of Far West !