Fans of US band The Killers desperate for tickets for their sold-out Cardiff Castle gig on Friday, June 28 are being ripped off by scammers.
The chart-topping Las Vegas group announced the date in the capital in March, having last performed in Wales in 2018 when they took Swansea's Liberty Stadium by storm .
Tickets went on sale priced £82.50 and were all snapped up within minutes of being released.
However, given that this will be the band's first Cardiff gig in seven years - not to mention the only other UK gig aside from their headlining Glastonbury set - demand from those who missed out on bagging entry is very high.
And, as a result, they have become easy prey for con artists, with some forking out £100s for tickets that simply don't exist.
"I have been scammed! Absolutely devastated as it was a gift for my Sisters birthday," posted Bristol's Claire Seymour.
"I honestly can't believe that people can do this."
But, as some more savvy Facebook users advise, there are ways to spot a scammer.
"Beware of fake profile pics on here offering tickets," says Jon Barnes from Somerset who noticed some hailing from as far afield as Nigeria.
"I've already called out three that had Nigerian/North African friends and interests - one even followed an Islamic State videos page."
Dan Simmons from Cardiff also pops up regularly through the page's discussion thread to out those whose credibility appears to be lacking, saying one of them "won't show proof of purchase and was charging £50 per ticket, which is ridiculously cheap considering they are £82.50. Scumbag".
Also, reputable outlets such as SeeTickets and Ticketmaster usually don't issue tickets to the lucky purchasers until a week before the gig itself.
Yet the likes of Abhiahek Abhishek was offering his back in June, and he sent Dan a very obvious fake confirmation email.
"All his photos were uploaded three hours ago and, if you look closely, there's a picture with a poster in the background of San Jose University, which is in California," he adds.
"Check this pathetic confirmation email for a laugh. Apparently The Killers are on for 24 hours.
"Also don’t trust someone who’s profile picture is a f****** Rolex. He’s already blocked me.
And it's not the first time Killers fans have been caught out either.
"Went to see The Killers at Hyde Park in 2017 and had a few spare tickets as members of our party couldn't come," adds Golds Hurst from Bristol.
"Sold to an older couple waiting outside who had paid £200 for their fake tickets and arrived absolutely devastated to not be let it.
"So glad we could help them - some absolute dogs out there."
