Personally I believe that the whole 'grey market question' has been a complete fiasko for the name Yamaha.
Including the realistic "investment value" of [any] such piano should you decide to purchase this brand at all.
There is no other world class product on the market that has been embroiled in so much controversy and allegations of sorts WITHIN its very own product line.
And no matter what "the truth" of the whole thing is, it has created a controversy or at least a huge amount of consumer doubt which will and MUST linger around for years to come.
Meantime,many other manufacturers have come to improve their product lines today to such an extent that they can now offer a far more reliable [manufacturer's full warranty on the WHOLE piano!] -purchase experience for same cost..
And they certainly haven't stopped to bring out even better products - seemingly non-stop....
- AS WE SPEAK!!
It's for every shopper to go out and find the many
'true bargains' available out there today....
["grey market"......or NOT