As a rising star in the NBA, Josh Giddey's rookie basketball cards are in high demand among collectors. The Australian guard was selected 6th overall by the Oklahoma City Thunder in the 2021 NBA draft and went on to have an impressive debut season. With fans and investors clamoring for his cards, some of Giddey's rarest cards have sold for huge prices at auction.

Let's take a look at the 5 most expensive Josh Giddey cards sold to date.

1. 2021-22 National Treasures Colossal Signature Patch Auto BGS 9.5 - $13,230

The 2021-22 National Treasures set is seen as one of the most premium, high-end releases each year. This scarce Colossal Signature Patch Auto card of Giddey comes with an on-card autograph and large patch embedded into the card. Graded an impressive 9.5 by Beckett Grading Services (BGS), its flawless condition and incredible rarity helped drive bidding on this card over $13,000 - making it the current record holder for the most expensive Giddey card sale.

Only 5 copies of this card were printed, instantly making it a centerpiece for the most discerning Giddey and Thunder collectors. Given his progress during his rookie campaign, market analysts theorize this card could potentially double in value within a few seasons if Giddey makes his first NBA All-Star team.

2. 2021-22 Flawless Josh Giddey RPA Auto Patch Booklet 1/5 - $9,999

From Panini's luxurious Flawless release, this RPA (Rookie Patch Auto) booklet card of Josh Giddey truly lives up to the product's name. With an autographed patch piece and print run of only 5 copies, scarcity meets premium design.

Graded a pristine BGS 10, this card fetched just under the $10,000 mark at auction. Beyond the 1/5 serial numbering, Flawless is known for hard-signed autographs and booklet-style cards that pan out - making this a grail Giddey card for many collectors. If he can build on his promising rookie numbers of 12.5 points, 7.8 rebounds and 6.4 assists per game, this card's value will likely continue rising.

3. 2021-22 National Treasures Colossal Materials Patch Auto 1/5 BGS 9 - $7,600

The 2nd National Treasures Giddey card to make the list, this Colossal Materials Patch Auto shows why the set is a standout for pricy rookie cards each NBA season. Limited to only 5 copies and packing both an on-card signature and jumbo patch, it's easy to see why bidding eclipsed $7k for this graded BGS 9 copy.

While its BGS 9 grade lags a touch behind the aforementioned BGS 9.5 copy, National Treasures has proven to churn out cards that gain value rapidly. Considering Giddey's untapped potential and collector intrigue, this scarce rookie card has plenty of room to run.

4. 2021-22 Flawless Josh Giddey RPA Auto Jumbo Patch 1/10 - $6,000

The 2nd Flawless card to crack the list, this RPA Auto Jumbo Patch serial numbered 1/10 captures the emergent Thunder star in a way sure to excite collectors. With Flawless living up to its billing year after year, the jumbo patch paired with hard-signed autograph make cards like this a big hit.

Raw versions have traded over $4,000, but grading services matter - this BGS 9.5 copy surpassed $6,000 at auction as investors vie for the key cards of one of the NBA's most promising rookies. If Giddey builds on his first season and blossoms into an NBA All-Star, you can expect his Flawless RPAs to spike even higher in the coming years.

5. 2021-22 Immaculate Collection Precious Metals Green Prime Signature Patches Auto 1/5 BGS 9 - $5,500

Closing out the list is a striking card from 2021-22 Immaculate Collection's Precious Metals series. With a flashy gold design, prime patches, and print run of only 5 copies, it's easy to see why demand is red-hot for rare Giddey cards of this caliber.

Graded BGS 9, its condition is impressive considering how delicate and intricate these cards prove to be. Once again, it's the blend of hard-signed autograph, low serial numbering, and bold design that puts key rookie cards over the top. If Giddey emerges as the future face of the Thunder franchise as many expect, this Precious Metals card will almost certainly continue appreciating.

Conclusion

Thanks to the perfect storm of rookie hype, elite potential, and scarce print runs, Josh Giddey's rarest 2021-22 basketball cards are commanding huge prices early in his career. Time will tell if he evolves into a perennial NBA All-Star and leads the Thunder back to contention - if so, the values of these cards are poised to skyrocket. Investors and collectors are clamoring to acquire Giddey's top rookie cards before his prices potentially soar out of reach.

While releases like National Treasures, Flawless, and Immaculate Collection are clearly the cream of the crop for the Australian phenom, other key cards will likely join this list as his career progresses. If Giddey makes his first All-Star team or leads the league in assists someday, the basketball card market will certainly take notice. For now, these ultra rare signed and serial numbered cards represent the pinnacle of Josh Giddey collecting.