Rick LaubscherThis ex-Newark streetcar and 15 others could be back on the streets of San Francisco -- for $18.7 million​Everyone loves the F-Line trolleys -- for one-third the price of a cable car you can meet just as many Danish tourists and additionally travel somewhere you'd want to go. It's a great deal -- and railway aficionados would also have us believe that it's a great deal to expend $18.7 million rehabilitating 16 trolley cars. In fact, the nonprofit Market Street Railway thinks it's