Well straight values would effect everyone. Whether you wanted to or not, if an item has a straight value. Thats what you need to trade. There would be no more offers. Simply credits or credit values of items.
Back in the old vmk if you were lucky enough you could get what you wanted when you...
one of everything (2 teleporterS)
with 2 trolly couches, and two of each lamp
edit: I believe thats 5450 without the teleporters, I don't know how much they were sold for.