The British rock band started ticket sales on Monday at 10am for certain fans who had previously signed up on Coldplay.com for its artist presale.
A check by the Post found all tickets were sold out within minutes, but a number reappeared quickly on platforms such as Facebook and Carousell at inflated prices.
One seller listed their two tickets at HK$3,000 (US$386) each – three times the price of the original HK$999 (US$129) per ticket.
Another seller listed a pair of standing tickets for HK$7,000, amounting to 2½ times each of the official price of HK$1,399 per standing ticket.
A number of scalpers also listed their goods at HK$0 or at the original price, but in the description asked potential buyers to come up with an offer, effectively auctioning the tickets to the highest bidder.