Possible Clues:

• Bound to return one in German market
• Get some money back on food container, its contents ridiculously dear
• Trained to organise valuation of part of deal
• Used-car-lot transaction
• Something used in part exchange
• Common car sale component
• I daren't (anag)
• Edward turns up in procession with second-hand car
• Article used in part-exchange
• I daren't crash second-hand car