Complex sentence: The low-end model had 1 MB memory, no hard disk, and cost $1,000, while the $1,500 model used 2 MB memory and a 40 MB hard disk.
Split into simpler sentences: The low-end model had 1 MB memory, no hard disk, and cost $1,000. The $1,500 model used 2 MB memory and a 40 MB hard disk.