I found this pretty fascinating. It's a rundown of sales for shows, using the 2000-present list as far as I can tell, by each animation production company. Includes complete series only, so no K-ON!!, AB!, etc.
I think it's using the more accurate w/o boxset sales, e.g. FMA at 36k not 50+k. Some shows are listed more than once, for example they have Mahoromatic under Gainax and Shaft even though most people would think of it primarily as a Gainax show.
Really shows who the powerhouses are...
Kyoto Animation, 12 shows, 9
The only ones under 10k were two FMP seasons (neither of which did badly) and poor SoraAge, their only show not to chart. But damnit, it's so goood
. Oh and since this list doesn't include K-ON!!, make that 10 of 13 passing 10k.
Shaft's list is amusing, of course. Remove Mahoro and drop Negima!? (I don't know where they got 12k, I'm seeing 8k elsewhere) and you've got one show with a per disc average nearly 10 times anything else they've done. Though its even bigger for Satellite, with their #2 after Macross F's 46k beign less than 3k for Aquarion.
Sunrise is as expected: gundam gundam geass geass gundam gundam.
A-1 is doing decently. Three over 10k, 4 with Working!!. Sora no Woto would be next at around 4k.