I'm hunting down the very best Prime Day Lego deals, here are all the biggest sales hand-picked by an expert builder

You're probably gonna need this...
Seeing as many of the best Prime Day deals are exclusive to Prime members, you'll need a subscription if you want the most tempting offers.

Amazon Prime | $14.99 per month
Prime for Young Adults (18-24) | $7.49 per month

Lego Star Wars C-3PO | $139.99 $111.95 at Amazon
Save $28 - Thank the maker, because another Star Wars kit has hit a record low price... this time, it's C-3PO. This newer kit impressed in our Lego C-3PO review, so being able to get it at its cheapest isn't an opportunity to miss.

Buy it if:
✅ You like the droids in Star Wars best
✅ You're buying R2 too

Don't buy it if:
❌ You'd prefer to just have R2

Price check:
💲 Best Buy | $139.99

Lego Star Wars R2-D2 | $99.99 $79.99 at Amazon
Save $20 - This is just a single dollar away from being the adorable astromech's lowest ever price, and because we liked it so much in our Lego R2-D2 review, that's a great opportunity.

Buy it if:
✅ R2 is your favorite Star Wars character
✅ You'll get C-3PO too

Don't buy it if:
❌ You have the older, bigger version

Price check:
💲 Walmart | $79.99

Lego McLaren Formula 1 | $199.99 $125 at Walmart
Save $75 - It's not Amazon, sure, but this is a great example of why you shouldn't just stick to that retailer for Prime Day. Competing stores like Walmart have their own major price cuts, which is why I'm spotlighting this beauty. As noted in our Lego McLaren Formula 1 review, this is the "pinnacle of motorsport and Lego engineering."

Buy it if:
✅ You want a more complex build
✅ You're a massive F1 fan

Don't buy it if:
❌ You get frustrated with complicated sets

Price check:
💲 Amazon | $199.99

Lego Hogwarts Castle and Grounds | $169.99 $144.99 at Amazon
Save $25 - I've got this epic display set on my desk to build next, and it's quite a beauty once constructed. In fact, I'd argue that it's one of the best Harry Potter kits for most people. That's why it being 15% less right now is good news.

Buy it if:
✅ You want a Harry Potter centerpiece
✅ You don't want anything too big or expensive

Don't buy it if:
❌ You're saving up for the larger Hogwarts

Price check:
💲 Walmart | $144.99

Lego Botanicals Tiny Plants | $49.99 $39.99 at Amazon
Save $10 - So many of us on the team have picked up plants from the Botanicals range, either for ourselves as display pieces or as gifts. Our Guides Editor Iain Wilson picked up these last Christmas and I remember him saying how cool the set was, so it gets an inclusion here.

Buy it if:
✅ You want to jazz up your desk or shelf
✅ You want a good gift

Don't buy it if:
❌ You'd rather get real plants

Price check:
💲 Walmart | $39.99

Lego Star Wars Millennium Falcon | $84.99 $67.98 at Amazon
Save $17 - WThis is comfortably one of my favorite Lego sets, and as I mention in my Lego Millennium Falcon review, it's probably the best Star Wars kits for most people. Because it's never been available for less and doesn't typically dip below $74, this is an absolute steal for Prime Day Lego deals 2025.

Buy it if:
✅ You want the galaxy's most iconic hunk o' junk
✅ You don't have room/budget for the other versions

Don't buy it if:
❌ You'd prefer the bigger ones

Price check:
💲 Walmart | $67.98

Lego Walt Disney Tribute Camera | $99.99 $62.99 at Amazon
Save $37 - This kit really impressed us in our Lego Walt Disney Tribute Camera review, and it's a loving ode to the company that means so much to so many. It's never been cheaper by my reckoning, and is normally closer to $90.

Buy it if:
✅ You want a piece of Disney history
✅ You want a centerpiece for your collection

Don't buy it if:
❌ You'd rather save for the castle

Price check:
💲 Walmart | $97.49

Lego Transformers Optimus Prime | $179.99 $143.99 at Amazon
Save $36 - This recreation of the iconic Autobot has only ever been five cents cheaper, which is great value for a model our Lego Optimus Prime review was full of praise for. In terms of context, the average price for this one over the past year has been anywhere up to $150.

Buy it if:
✅ You adore old-school Transformers
✅ You want a set with a party trick

Don't buy it if:
❌ You'd prefer a Decepticon

Price check:
💲 Walmart | $143.99

Lego Star Wars Imperial Star Destroyer | $159.99 $111.99 at Amazon
Save $48 - Another kit on my to-do list is the impressive Star Destroyer, and I'm not the only one drawn to it from what I can tell; it tends to do very well when it goes on sale, just like it has now. It's currently almost $50 less, and the average cost is $159, so that's an absolute bargain in this week's Prime Day Lego deals.

Buy it if:
✅ You're building a Lego fleet
✅ You missed out on the old UCS kit

Don't buy it if:
❌ You'd rather get as full-size one

Price check:
💲 Walmart | $199.98