Tickets for Radio 1’s Big Weekend are being touted online for up to £650 a pair.
Free tickets were made available last month via the station’s website, but were snapped up in under an hour — leaving thousands of music fans disappointed.
Now touts are trying to cash in on the huge demand.
A pair of tickets for the Saturday event are on sale on eBay with a starting price of £400, or £650 for an immediate sale.
The BBC has warned that tickets resold may not be honoured, and said it was working with eBay to have the tickets removed.
A spokesperson said: “This happens at every major event.
“We work with sites such as eBay and Gumtree to have tickets removed from sale as soon as they are brought to our attention.”
Meanwhile, the One Big Weekend line-up surprised many — but it also killed off months of speculation that superstars such as Beyonce, One Direction, Alicia Keys, David Bowie and Daft Punk would be coming to the city.
The Big Weekend will be broadcast live on Radio 1, BBC Radio 1Xtra and streamed online at bbc.co.uk/radio1/bigweekend, Red Button and on mobile.
Hundreds queued up at the weekend for tickets to the Radio One Academy. Dozens of workshops, gigs and classes will be staged at the Nerve Centre from this weekend featuring The Script, Zane Lowe and a host of local artists such as Soak, Little Bear and the Wonder Villains.
Radio One DJs, the cast of EastEnders and industry professionals will also be hosting events.
Ben Cooper, Controller of Radio 1 and 1Xtra, said: “This event is my favourite moment of the year — watching a great crowd sing along to amazing artists makes the hairs on the back of your neck stand on end.”