D-Structure question

how can they afford to have skis like the ar5 for example for 629cad (537usd) when there's other internet sites that have em for 339 (thats the lowest i've seen so far). i mean, do people actually buy stuff for these prices? there's so many skis they have that if you looked elsewhere, you could get em a couple hundred bucks cheaper. am i missin somethin here? i'm not trying to be bitter, but it doesn't seem right. i must be out of the loop..