Random trading market: Drawbacks and a realistic modification

We point out some major drawbacks in random trading market models and propose a realistic modification which overcomes such drawbacks through `sensible trading'. We apply such trading policy in different situations: a) Agents with zero saving factor b) with constant saving factor and c) with random saving factor --in all the cases the richer agents seem to follow power laws in terms of their wealth (money) distribution which support Pareto's observation.