There's all this talk about sales and if it's worth it to do DS9, but I really wonder what sales does CBS look for with these sets. I get maybe sending out limited supply, but I was looking in the Target ad (online, so I might have missed it) last night and there was no mention of Season 6 or Chain of Command. Then when you go to a store, there is only like 3 or 4 copies. Kind of hard to sell them when you don't have any to begin with.
When Target was advertising the previous seasons with the solo episode for $10, they had only 2-3 copies of each at opening time. If I didn't get there at 8:30AM, they'd already be gone.
Look around all brick-and-mortar stores - Target, Best Buy, the movie sections continue to get smaller and smaller entirely. It's not just TNG.