Rugby league fans have rallied to say a special thanks to champion Bronco Darren Lockyer with less than 2000 tickets remaining for his farewell NRL regular-season home game against Manly at Suncorp Stadium on September 4.

Since TV rights holders Channel 9 recently agreed to public demands to switch the marquee game from Friday night to Sunday afternoon, allowing thousands of country fans to attend Lockyer's special day, ticket sales have gone through the roof.

The "sold out" sign is expected to be hoisted before the weekend, making it the first advanced sellout for a NRL match since the re-furbished Suncorp Stadium was re-opened in 2003.

Brisbane's biggest crowd this season was their round-one opener with North Queensland which pulled 45,119 fans.

After missing the chance to be part of Lockyer's record-breaking 350th NRL game in Townsville last weekend, his army of supporters have a chance to show their appreciation with home games against South Sydney (round 25) and Manly (round 26) before the finals.

Brisbane chief executive Paul White confirmed to AAP on Tuesday that less than 2000 tickets - most of them singles - were all that were available to fans hoping to attend Lockyer's last game before the finals.

Brisbane could be playing Manly for second spot on the ladder in the last round of the minor premiership when the top-eight finishing order will be sorted out.

"It could be a massive game if that's the case but there's no doubt Lockyer's enormous popularity is a contributing factor," White said.

"The way the side is playing and being locked in the theatre for a top-four spot are obviously part of the attraction.

"But if you asked me to give a predominant reason, I'd have to say it's a mark of respect to our great captain."

White, who has a strong rugby league background as a successful player and coach, says fans had a sense of the big occasion and loved saying thanks to their greats.

"It's one of the wonderful things about our game that fans buy into those emotional occasions and the history," he said.

"We might not see another one like him and I think people are pretty aware of that."

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