For the next four days i3 is giving you the chance the purchase DSP-Quattro for 50% off in a special Christmas offer. Order on December 23, 24, 25 or 26 and you'll get your DSP-Quattro 2.x full license with 50% OFF.
The DSP-Quattro special price is €59.5 / $74.5 (instead of €119 / $149).