HTC to announce Vive price at Mobile World Congress - NeoGAFclearly not a problem to have a large gap and be lower in price so this basically confirms a price above $600 and a big enough gap to be of concern.
Article in Japanese so someone might be able to provide better translation
Seems HTC will announce the Vive price at MWC (22nd to 25th), then open up pre order online at their digital shop (29th).
Japan confirmed as one of the countries where the product will launch first
I think they have also acknowledged that high price will be an issue on install base penetration, and they said they have tried to revise the price tag so that the price gap with other VR hmds wont be too big.