It depends on the label. Tesco has been putting a good deal of their back catalog on there.
Genocide Organ (about 10 of their releases)
Deathpile - G.R.
Bloodyminded
Institut
Operation Cleansweep - Power Hungry
Grey Wolves - Division, Blood & Sand
Tesco Disco - Heavy Electronics II
Sutcliffe Jugend
Whitehouse
IRM - Oedipus Dethroned, Virgin Mind
Navicon Torture Technologies
Theologian
Con-Dom - The Eighth Pillar, Acts of Faith, The Beautiful, All in Good Faith, Control Domination