The big Amazon Spring Sale is still underway, and will be until Monday, March 31. There's lots of deals for board games, action figures, and even nerf guns. But most notably, (at least for this writer), LEGO sets are on sale, which is very uncommon, even during big-deal events like this one.Here are some the best LEGO deals from Amazon's Spring sale.Amazon Spring Sale: LEGO DealsLEGO Dune Atreides Royal OrnithopterLEGO The Mighty BowserLEGO Mos Espa PodraceLEGO Back to the Future Time MachineLEGO Optimus PrimeLEGO Vincent Van Gogh The Starry NightLEGO AT-TE WalkerLEGO The Dark FalconLEGO Wednesday Addams FigureLEGO Wednesday & Enid's Dorm RoomLEGO retires old sets at same time that it debuts new ones, which pretty much guarantees that they can sell their inventory at full retail price. Add to this the recent price increases across LEGO's products, and your wallet is definitely getting a workout. The standout of this deal roundup is the LEGO Mighty Bowser, which we reviewed at the time of its release. We consider it to be one of the best LEGO sets ever designed, in the time since we began reviewing them six years ago.Also worth noting is the Back to the Future Delorean Time Machine, which allows you to build all three versions from the three respective films. Also don't miss out on the Optimus Prime, which actually transforms from vehicle to Autobot and back again.Why Should You Trust IGN's Deals Team?IGN's deals team has a combined 30+ years of experience finding the best discounts in gaming, tech, and just about every other category. We don't try to trick our readers into buying things they don't need at prices that aren't worth buying something at. Our ultimate goal is to surface the best possible deals from brands we trust and our editorial team has personal experience with. You can check out our deals standards here for more information on our process, or keep up with the latest deals we find on IGN's Deals account on Twitter.Kevin Wong is a contributing freelancer for IGN, specializing in LEGO. He's also been published in Complex, Engadget, Gamespot, Kotaku, and more. Follow him on Twitter at @kevinjameswong.