Looking for a dirt cheap basic rulebook for FSpaceRPG. The Net Rules is just what you're looking for. This edition is a barebones edition with no embellishments for players who just want the minimum. It isn't suitable for use by a GM, or those players who want more than a casual reference.
This edition contains basic outlines for:
character generation including human statistic generator
personal combat system
Intelligent Life article
Modified Kardashev-2 Civilisation Classifications
Communications and computer equipment.