Former chief whip Andrew Mitchell's bicycle, which was at the centre of the "plebgate" row, is now for sale on eBay.
Mitchell was riding the seven-year-old bike when police officers refused to let him leave Downing Street via the main gate in September last year.
It was claimed at the time that Mitchell swore at the officers and called them "plebs".
Mitchell - who strenuously denies the allegation that he called the officers "plebs" - was forced to resign after a series of damaging headlines.
He has now put his "hard-working" Reflux Westminster on sale as he seeks to give it a "good home out of the limelight".
All the proceeds from the sale will go to the charity Nyumbani UK, which helps HIV and AIDS affected children in Kenya.
The 18-speed two-wheeler, complete with front basket, has so far attracted one anonymous bid of £200, but will stay on sale until Thursday at 7pm.
Scotland Yard are investigating the Downing Street dispute in the wake of a Channel 4 investigation which cast doubt on the original account of the incident.
The programme revealed CCTV footage which showed there was not a large group of tourists outside the main gate at the time, as had originally been claimed.
An email from a civilian witness backing up the police account of events has also since been called into question.