Sounds a bit complicated for my simple mind to understand - I personally think that the way it is implemented at the moment is fine - people want to sell their items so they ask for lower amounts than their competitors. If someone managed to get some cheap then he can sell it cheap and rule the market for a period of time - IMO it works very well.
Also - the 3000 cap is essential, I think - because not only does it encourage PA shops, but it also means that weapons are harder to come by, and so you'll see a few less people with uber weapons and you will see people gasping at some guy's huge laser cannon (I have found myself oogling at someone's rifle) and so all in all, I think the Bazaar system is as well done as it could be.
SWG Name: Sorce Ipaigwik
Planet/Town: Usually Coronet, Corellia.