"Home Computers" in Nov 1988.

Hi,
A quick question which some on this group might know. A researcher contacted me today. He looking at some old sales data has a "Home Computer" listed at $605 and wants to identify the computer. Anyone know what this could be? I'm thinking either Amiga 500, one of the Atari ST models or even the Commodore 64. I wasn't paying attention to prices for that period in the day, and have no literature with prices cited.
One a related note, there is also a "Home Computer Monitor" listed at $680. Would it be one specific for one of the machines above?
A quick question which some on this group might know. A researcher contacted me today. He looking at some old sales data has a "Home Computer" listed at $605 and wants to identify the computer. Anyone know what this could be? I'm thinking either Amiga 500, one of the Atari ST models or even the Commodore 64. I wasn't paying attention to prices for that period in the day, and have no literature with prices cited.
One a related note, there is also a "Home Computer Monitor" listed at $680. Would it be one specific for one of the machines above?