http://www.gumtree.com.au/s-ad/kensington/bicycles/700c-mountain-bike/1059175608
...ouch. He's got some other gems on too.
@JWestland started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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http://www.gumtree.com.au/s-ad/kensington/bicycles/700c-mountain-bike/1059175608