British Car Auctions (BCA) has reported an increase in demand for the most fuel-efficient used vehicles, leading to a surge in their prices.
A shortage of such vehicles in the market is the main factor pushing the price levels upward.
The rise is also expected to result in an increase in the number of people taking outcar insurance for fuel-efficient cars.
Tim Naylor of BCA said: "The demand is there, but supply is a major issue for anyone wanting to buy the most fuel efficient used vehicles.
"A quick look at our online stock locator on just one day found only 78 vehicles for sale throughout our nationwide network of auctions that matched the Fuel-Economy.co.uk list of most fuel-efficient cars.
"This is fairly representative of the current low availability of these vehicles as used cars and compares to the 12,000 plus vehicles BCA typically has consigned for sale on any given day."
According to Fuel-Economy.co.uk, the Honda Insight petrol hybrid, Renault Clio 1.5 dCi, Toyota Prius petrol hybrid and Citroen 1.4 litre diesel models C1, C2 and C3 are among the leading most fuel-efficient diesels and petrol hybrids.
Meanwhile the smart Roadster; smart fortwo, Toyota Aygo, Citroen C1, Peugeot 107 and Daihatsu Charade are included in the list of the top 10 most fuel-efficient petrol cars.
Naylor added "As fuel prices continue to climb, we expect used values for the most fuel-efficient cars to keep rising as well."
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