It depends on how much you want it, or on whether you happen to be in Australia.
For some reason, "Picket Fences," a series that made a point of being as American as apple pie (at least a weird version of apple pie where the apples all have some kind of secret), seems to be more popular in Australia than in the U.S.
So the home-video companies think, anyway. The first season was released on DVD in the U.S. way back in 2007, but none of its subsequent three seasons got a domestic release. In Australia, on the other hand, the whole series is available in a boxed set released by Australian home-video company ViaVision.
So, while you won't find it in stores (unless, again, you frequent Australian stores), you can order it online. But it'll take a while to ship.
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