Yes, it has. it takes about 14 hours. depart from Sydney: 16:20pm and arrive in Brisbane: 6:30am of next day.
first class seat about $160, economy class about $110.00.
between $80 to $500 depend on the time and airline
The cheap one may be only $79 in Virginvlue. and the expense one may be more than $500 in Qantas.
you may get $30 ticket on some speical day.