A teenage Apple fan at the head of the queue for the new iPhone 5S has said he would consider selling his spot for £1,000.

Gad Harari, who has been camping outside Apple's flagship London store in Regent Street in a makeshift tent since Monday, said he would be prepared to give up the coveted spot if offered a four-figure sum.

Joining him on his four-day vigil is friend Noah Green, also 17. The duo plan to buy the iPhone 5S, which was unveiled along with Apple's first mid-range phone the 5C, when it goes on sale on Friday at 8am.

"We are always among the first to get a new iPhone," Mr Harari said. "I came down last night to be the first - this time we really wanted to be first."

The 17-year-old, from Hendon in north London, added: "It's how you really show your dedication to Apple products. As well as that, you do have the opportunity to sell your space.

"I would probably sell my place in the queue for about £1,000. There are crazy people who are willing to do that."

Harari has already refused an offer of £200 for his place in the queue, added: "People will offer at least £500 or £600" later on.

The students are familiar faces in the line outside the Regent Street store in central London. Green, who runs his own web business, said this will be his fourth year queuing for Apple products.

"I collect Apple products," he said. "I pretty much have everything that Apple makes."

The 5S device, said to be twice as fast as its predecessor, features a fingerprint scanner and comes in gold, silver or "space" grey.

It will be available through EE, O2, Three, Carphone Warehouse and Phones4u priced at £549 (16GB), £629 (32GB) and £709 (64GB).