Irish rugby fans without a ticket to the team's next match against the All Blacks could expect to pay almost €900 for a standard seat.
Prices for the sold-out Ireland v New Zealand game continue to skyrocket, especially in the wake of Ireland's historic victory over the weekend.
Official vendors found themselves sold out well in advance of next week's Guinness Series clash in the Aviva Stadium.
Other sellers however are still offering a chance to catch the action at a much higher price.
London-based website Viagogo is selling tickets, with prices starting from €271.64 for seats behind the posts.
Prices on the same site rise to €336.74 for row A spots, while some tickets for the east and west stands' upper tier are going for €381.64.
The most expensive tickets on the site are those on the lower tier in the east or west stands, for €897.98.
Meanwhile, Seatwave.ie is offering category A tickets, which range in price from €342.25 to €599.
Seatwave.ie, a Ticketmaster company that only facilitates ticket sales by third-party sellers, is also selling premium tickets priced between €475 and €750.
Separately, Premiertickets.ie advertised tickets on sale with prices starting at around €300.
However, the site later took down the web page hosting ticket sales for the event.
None of the websites responded when contacted by the Herald.
Official tickets originally cost a fraction of what is being asked on such websites.
Tickets to the Aviva Stadium match ranged from €25 to €95 for standard seats, while premium and corporate options cost around €120. The IRFU was unavailable for comment last night but has previously strongly advised fans not to seek tickets from disreputable or unofficial sources.
Last year, the organisation threatened to cancel tickets to Ireland's Six Nations match against England if they were found to be far above face value.
In a statement released at the time, an IRFU spokesperson said all tickets issued through IRFU channels "are traceable to the individual purchaser".
"When the IRFU becomes aware of tickets being resold, above face value, we follow up with the original purchaser, where sufficient information is available to identify them, and we request that they desist from the practice or their ticket will be cancelled," it said.
"However, our advice to fans is clear - do not purchase tickets from unofficial sources."
This month's home game will be an opportunity for Ireland to reassert the dominance the team showed against New Zealand in the Chicago Bears stadium.
The side delighted Irish fans by scoring five tries on their way to a famous victory by a final score of 40 points to 29.