Matt Matthews @ Gamasutra: "Curt Vendel is known in the classic videogame scene as the owner of the Atari History Museum and designer of the Flashback consoles (essentially clones of the Atari 2600, designed without cartridges for modern consumers). A couple of days ago he released some Atari documents he had on sales of Atari's third major console, the Atari 7800.
I put them together and made a graph so we could more easily see how the hardware sold. Keep in mind: these appear to be shipments to retailers, not units sold through to consumers. Moreover, not all units went to retailers, so some might have been for reviews or other media coverage."