A rare pair of Nike trainers similar to those worn by US basketball star Michael Jordan in the hit Hollywood movie Space Jam are set to go on sale for a world-record £15,000.

The trainers, a pair of Nike Jordan 11 Retros with very rare markings, were part of Nike's Michael Jordan range. But instead of bearing the basketball star's usual shirt number, 23, they have 45, which Jordan wore in the semi-animated film.

The size eights are being sold by London sports shop owner Kashif Sethi, aged 30, who claims they were a gift from an unwitting Nike rep. He was unaware of their value until he took them into the Nike Town store in New York.

Kashif said: "All hell broke loose when the staff noticed the number 45. They almost had to close down the store's basketball section because there was such a fuss.

"One of the staff said he would pay me all his savings - about £3000 - for the shoes." He added: "I keep one shoe at the shop and the other is under lock and key in a safe at a secret location."

A spokesman for the sports wear giant said: "We are aware some of our trainers are very valuable."

According to the Guinness Book of Records the most expensive sports shoes ever made were mink-lined golf shoes with 18-carat gold trimmings and ruby-tipped spikes that fetched £13,600 a pair in 1993.

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Footwear (Key Note Report)