At 299 and 350, consider it a game of chance.
Or a gamble. You either get a DVD5 you expected, or get a pleasant surprise/win if it's a DVD9. In my case with the Silverado disc, I got a DVD9 and a DTS track besides.
Ofcourse, you won't win all the time or even most of the time. But I'm glad that so far, all the budget 299 and 350 DVDs I got lately, Silverado, Last Temptation of Christ and The Lost World, all of them are DVD9s.