Second-hand grain/silage trailers: A row of creaky old trailers is just the tonic to lift the spirits and warm the cockles of a depressed auctioneer at a slow and bitterly cold winter sale. Why? Because lively auction bidding can see an ageing wagon, which in reality is little more than wheeled scrap, commanding money that could buy a more modern trailer that’s ready for work. James de Havilland offers a few reminders of the key points to look for when considering a used trailer purchase.

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