The Triumph Scrambler Bonneville, one of only three specially-customised motorbikes featured in the film, is on sale on

It was ridden by Pratt in thrilling chase scenes in the blockbuster action movie, and all proceeds from the auction will go to The Distinguished Gentleman's Ride, an annual event in aid of prostate cancer charities.

The auction is due to close on 2 August (15) and bidding had reached $12,800 (£8,000) as WENN went to press.