Well, in a free market, lowering prices on existing products is usually an indication of the imminent release of a newer product with similar functionality. However, as I'm learning, the Polish market is a little weird, at least from my perspective. Maybe they just over-produced the Mediator, and realizing how yet another questionable product announcement could hurt them financially, they decided to lower prices to increase sales.
(The most likely explanation has already been stated--that they lowered prices on their existing products to increase revenue and raise captial to develop the Dragon, which probably only exists as a design or perhaps a very rough prototype.)
Trev