PROSPER was optimistically named by the first shipload of colonists, despite disturbingly high readings from their radiation detectors.  They found a way to make it work, and their descendants still control this fission-powered society.  The capital city, Burgeon, hosts a famed market (itself the size of a small city) that sells products from across the galaxy.  Haggling for lower prices is expected, if not exactly welcome, because Prosper is also famed for its shockingly abusive customary language.  Even friendly enquiries into the freshness of a vendor's produce are guaranteed to provoke an onslaught of indignant accusations about the customer's parentage, mating habits, and pusillanimity.  So one should not expect an easy or pleasant transaction unless one is willing to simply toss a heap of money on the counter and accept whatever product the proprietor deems fit to offer.  Some people have been known to smilingly do this, for whatever reason.  They are, of course, horrendously overcharged.