Offers of tickets for the sold-out Glastonbury music festival have appeared on the eBay auction site despite attempts to beat ticket touts.
Festival organisers warn against buying 'unofficial tickets'
By Wednesday lunchtime pairs of tickets were being offered for more than £600.
Some eBay users said they had bought festival tickets last year using fake ID, but been caught out by security checks at the gate.
This year festival-goers will also need to show photo ID, which will be matched with the name on the tickets.
The 112,000 weekend tickets for the event at Pilton, Somerset on 24-26 June, cost £125.
Tickets went on sale on Sunday via the internet and telephone sales, and sold out in hours.
A spokesperson for eBay said: "The re-sale of concert tickets is not an illegal activity and is therefore permitted on eBay.co.uk.
"We will not prevent people from listing these tickets on the site but we would urge both buyers and sellers of Glastonbury tickets to read and understand the applicable terms and conditions."
One seller says he is selling his ticket as he was the only one from his group of friends who had managed to get a ticket and does not want to go on his own.
Others appear to be offering tickets from the allocation of 8,000 being sold separately to local residents.
But a statement on the Glastonbury festival website says: "Anyone now offering tickets for sale is utterly bogus. Do not purchase tickets from unofficial sources.
"This is not permitted under the tickets terms and conditions - you may lose your money and will not gain entry to the festival."