They seem to go for between �50 and �100, depending on condition. I sold mine (mint and never been on the bike) recently for �65. I wasn't being greedy, or giving it away - I just wanted shot of it. I sold it for what I'd be prepared to pay for it should I have needed one.

At the end of the day though, there worth whatever someone is prepared to pay for them. You might get lucky and there's someone desperate to get one, or it might be one of those times when ebay is littered with them.

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