. . . check one out if you can!
I have been a Matrox card fan since my G450 Millennium. I don't think I paid much for it, though the next model I bought was pricey if I were to think about it in simplistic dollars and cents. Absolutely incredible for 2D graphics, driver and sw upgrades and desktop expansion. After having used Matrox (now using the Parhelia), I see no reason to try another card. No reason, except curiosity I suppose. I just get the card and enjoy it, knowing it's going to work.
So to answer the question: Matrox cards are expensive because you buy it, use it, enjoy it and forget it. No worries and plenty of satisfaction.
Brangwen