The Rugby Football Union reiterated its opposition to secondary ticket sites as it warned fans considering paying exorbitant sums to watch England's final Six Nations match against Ireland that they risked being turned away.
Ireland visit Twickenham on Saturday looking for the victory that would seal a third Grand Slam and the chance to witness history has peaked the interest of rugby fans on both sides of the Irish Sea.
Flights from Dublin to London are around four times more expensive this weekend than on average, while ticket prices on the secondary market had reached £4,400 earlier this week according to the Telegraph.
On Friday, the sums quoted had come down to around £1,000-£1,800 but considering prices ranged from £45 for category six tickets to £161 for premium, fans risked paying around 1,200 percent more than face value.
That situation would be exacerbated if the purchased ticket did not get them into the ground. "Our stance on the secondary market is very clear," an RFU spokesperson said in an email to ESPN.
"Twickenham tickets cannot be sold on secondary websites. It is a clear breach of our ticketing terms and conditions, and we are constantly monitoring the marketplace.
"Our message to rugby fans is clear -- don't risk your money by purchasing tickets from a secondary site because if you do, there is a good chance you won't be able to get in.
"As ever, we want tickets to go to rugby fans who want to come to the match -- and not to people who want to trade them as a commodity."