Gary Perrin has tracked the trend of fixies which cost at least $ 500 .
Gary Perrin is a sales mechanic at the 25 - year - old Mermaid Beach - based family business Mike 's Bikes .
Gary Perrin , a sales mechanic at the 25 - year - old Mermaid Beach - based family business Mike 's Bikes , has tracked the trend of fixies which cost at least $ 500 .