If you're looking for the ultimate boy's toy, then Kris Benbow might just have the answer.

Because Mr Benbow, marketing executive for truck company Keltruck, found himself the proud owner of a Royal Navy Sea Harrier - after taking it in part-exchange for a second hand Scania lorry.

The decommissioned warplane, which saw active service in the Falklands in 1982, is now sitting in Keltruck's yard in West Bromwich and is being auctioned on internet site eBay, with the highest bid currently £21,000.

Mr Benbow took the jet as part of a deal with Lincolnshire-based Witham Specialist Vehicles, which sells and markets ex-Ministry of Defence vehicles and plant equipment.

He said: "We took the Harrier in exchange for one of our used Scania trucks. We saw it as bit of a challenge. When I first saw it I thought about keeping it and putting it in my garden."

Keltruck chairman Chris Kelly said: "We have taken some unusual things in part exchange over the past 25 years, including pallets of bricks and even live sheep, but this is certainly the most unusual."

The jet has become something of a novelty for visitors to Keltruck's base at junction 1 of the M5 motorway.

Mr Kelly said: "The Harrier has caused quite a stir locally with people having assumed it was flown in but it has actually been decommissioned and arrived on the back of a lorry.

"People just couldn't believe it when it arrived. It was one of the last Sea Harriers to come out of service, with the remaining ones that could still fly being sold off to the Indian Air Force. Now we are advertising it on eBay but will obviously be looking for thousands rather than millions of pounds. It will probably go to a collector of militaria or someone like that."

The BAE Sea Harrier was renowned for its vertical take-off and landing ability, hence the nickname Jump Jet. It first entered service with the Royal Navy in April 1980 and was withdrawn from service in March this year.

But the 700 mph fighter is not the first strange military item to be sold on eBay.

Two years ago a disarmed USAF Falcon Missile was put up for sale but the reserve price was not met.

A Russian firm also offered a Test Space Shuttle but the £1.5 million price tag and the £5,000 shipping price put off any buyers.