It's difficult to say, until the pricing of the new units is announced.
If it's greater, then there may be little impact on the price of the current models.
On the other hand, if the demand for the new units is great, or the price is not much greater... current owners may be willing to take a bit less for their current units to buy the new units.
I can tell you that if the price of the new DV337, or DV332 is substantially greater... as was suggested elsewhere here... the demand is unlikely to be very great... and the value of the current units could actually increase... if they're no longer offered by DV.
I doubt very much that many persons will pay a price premium for products that must be shipped half way around the globe, with all that risk that involves - when they can buy one of the great amps here at similar prices, from reliable vendors. It would make no sense.