| 3D Metal Assembly Bengal Tiger Kits-700PCS | enginediyshop.com | 99.99 USD | 169.99 USD | −41.2% |
| Hoglet 4.2CC Mini V2 Retro Motorcycle Engine Model with Pedal Start – OHV V-Twin Four-Stroke Gasoline Power | enginediyshop.com | 549.99 USD | 849.99 USD | −35.3% |
| SEMTO ENGINE ST-NF2 7.0cc Mini Inline Double-cylinder Four-stroke Air-cooled Nitro Internal Combustion Engine Model Kit | enginediyshop.com | 199.99 USD | 299.99 USD | −33.3% |
| ENJOMOR Christmas Metal Steam-Powered Car Model: A Functional Science & Education Collectible Gift | enginediyshop.com | 199.99 USD | 299.99 USD | −33.3% |
| CHEVY Small Block V8 Engine General Motors MOC Engine Model Building Blocks Toy Set - 2362PCS - Build Your Own V8 Engine | enginediyshop.com | 179.99 USD | 269.99 USD | −33.3% |
| CFM LEAP Turbofan Engine Technology Turbojet Engine Building Blocks Toy Set MOC-133571--1659 PCS | enginediyshop.com | 109.99 USD | 159.99 USD | −31.3% |
| RETROL MUSA 1/8 2.2cc Mini Single-cylinder Four-stroke Evaporative Water-cooling Gasoline Engine Internal Combustion Engine Model | enginediyshop.com | 449.99 USD | 649.99 USD | −30.8% |
| V16 Diesel Engine Model Building Blocks Set MOC-73232 --4777PCS -Build Your Own V16 Engine | enginediyshop.com | 331.99 USD | 479.99 USD | −30.8% |
| Mocsage MOC-208738 Feral Pigeon Building Blocks Set (255PCS) | enginediyshop.com | 19.99 USD | 25.99 USD | −23.1% |
| Milwaukee-Eight V-Twin OHV 8-Valve Four-Stroke Harley-Davidson MOC Motor Engine- 1653PCS-Build Your Own V2 Engine | enginediyshop.com | 179.99 USD | 229.99 USD | −21.7% |
| RETROL HM-01 7cc Antique Hit and Miss Model - Working 4-Stroke Horizontal Stationary IC Engine | enginediyshop.com | 389.99 USD | 489.99 USD | −20.4% |
| DIY Helicopter Model Kit Parts Working Hot Air Stirling Kit-Stirling Engine Model That Works | enginediyshop.com | 159.99 USD | 199.99 USD | −20% |
| Mini Horizontal Single-cylinder Three-stroke Engine Gasoline/Kerosene/Methanol Internal Combustion Engine Model | enginediyshop.com | 159.99 USD | 199.99 USD | −20% |
| MOC Crossplane V8 Engine with Supercharger & Removable Cover Building Toy Set, Build Your Own V8 Engine - 1054PCS | enginediyshop.com | 49.99 USD | 59.99 USD | −16.7% |
| 5 Cylinder Radial Engine Pneumatic Assembly Model Building Blocks Set MOC-39694-Build the Radial Engine Model Kit that Works | enginediyshop.com | 135.99 USD | 159.99 USD | −15% |
| Mocsage 1/2000 Scale World Trade Center (1973-2001) Micro Parts Building Blocks Set (982PCS) | enginediyshop.com | 29.99 USD | 34.99 USD | −14.3% |
| MOC-217187 Raven Bird Building Blocks Set (357PCS) | enginediyshop.com | 19.99 USD | 22.99 USD | −13% |
| TOYAN FS-S100AT1D-XP Single-Cylinder Four-Stroke Nitro & Gasoline Transparent Combustion Chamber Design Engine Model | enginediyshop.com | 349.99 USD | 399.99 USD | −12.5% |
| RETROL SE-01 Metal Stationary Beam Steam Engine Model and Horizontal Boiler Kit -85PCS | enginediyshop.com | 69.99 USD | 79.99 USD | −12.5% |
| V1313 Mini Vertical Single-Cylinder Steam Engine Model with Reversing Mechanism Steam-Powered Mechanical Model Experimental Kit | enginediyshop.com | 169.99 USD | 199.99 USD | −10.5% |
| MOC-1/17 Scale Volvo FH16 Truck Building Blocks Set(Dynamic Version) | enginediyshop.com | 159.99 USD | 175.99 USD | −9.1% |
| MOC Turbofan Aircraft Engine Model Kit - Realistic Turbofan Engine MOC Set --1813pcs | enginediyshop.com | 99.99 USD | 109.99 USD | −9.1% |
| RETROL & OKMO 3.6CC 185 Single-Cylinder 4-Stroke Gasoline Engine Model for Classic Vintage Tractor - Ready to Run | enginediyshop.com | 540.99 USD | 599.99 USD | −8.3% |
| 1.9cc Mini Atkinson Differential Opposed Piston Four-Stroke Gas Engine Internal Combustion Engine Model | enginediyshop.com | 369.99 USD | 399.99 USD | −7.5% |
| 1.6cc Mini SAM Hit and Miss Four-stroke Vertical Gas Engine Internal Combustion Engine Model with Flying Ball Speed Limiter | enginediyshop.com | 349.99 USD | 376.99 USD | −7.2% |
| H76 5CC Horizontal Gasoline Internal Combustion Engine Model Twin-cylinder Overhead Valve Dual Flywheel Vintage Motor | enginediyshop.com | 859.99 USD | 899.99 USD | −4.4% |
| MOC-141278 1/17 Scale 2-Stroke Six Cylinder Turbocharged Low-Speed Marine Diesel Engine Building Blocks Set（Dynamic Version /10737PCS） | enginediyshop.com | 729.99 USD | 749.99 USD | −2.7% |
| RUIFEIYA V12-180 180cc 1/4 Scale V12 4-Stroke Gasoline Engine Model – DOHC 48-Valve Water-Cooled Engine with ECU, CDI & Electric Start | enginediyshop.com | 10999.99 USD | — | — |
| RUIFEIYA V10-150 1/4 Scale Working V10 Gas Engine Model - 150cc DOHC 40-Valve 4-Stroke 3-Ring Water-Cooled Internal Combustion Engine (Assembled Version) | enginediyshop.com | 8999.99 USD | — | — |
| MOC -The Seven rings - Part A Super Large Building Block MOC Kit (99548PCS) | enginediyshop.com | 4418.99 USD | — | — |
| ENJOMOR GS-V8 PRO 78cc DOHC 4-Stroke 3-Ring 32-Valve Water-Cooled Gasoline Internal Combustion Engine Model with Electric Start (Assembled Version) | enginediyshop.com | 3299.99 USD | — | — |
| ENJOMOR GS-V12 72CC DOHC 4-Stroke 4-Valve Water-Cooled Gasoline V12 Internal Combustion Engine Model with Electric Start | enginediyshop.com | 3299.99 USD | — | — |
| ENJOMOR V12 Engine GS-V12 72CC DOHC 4-Stroke 12-Cylinder 48-Valve Water-Cooled Electric Start Gasoline Engine Model - V12 Engine Model That Works | enginediyshop.com | 3299.99 USD | — | — |
| MOC Notre Dame de Paris Modular Building Block Small Particle Model (63181Pcs) | enginediyshop.com | 2999.99 USD | — | — |
| TOYAN V8 Engine FS-V800G 28cc Gasoline Model Kit with Supercharger, CDI Ignition & Accessories - Perfectly Functional | enginediyshop.com | 2799.99 USD | — | — |
| CISON LS-52 V8 Engine Model Kit – 1/5 Scale Working 4-Stroke Gasoline Internal Combustion Engine | enginediyshop.com | 2499.99 USD | — | — |
| CISON V8 Pro Engine 1/6 Scale CISON Small-Block Model Water-Cooled 4-Stroke 8-Cylinder Gasoline Engine Internal Combustion V8 Engine Model Kit 44cc | enginediyshop.com | 2099.99 USD | — | — |
| Ancient Roman Bath Historical Display Building Block Set-30812PCS | enginediyshop.com | 1799.99 USD | — | — |
| TOYAN HOWIN FS-V800 1/10 Eight-cylinder Four-stroke Water-cooled Nitro Engine Model for RC Car & Boat | enginediyshop.com | 1699.99 USD | — | — |
| RETROL 16cc Water-Cooled Stationary Horizontal 4-Stroke Diesel Engine Model | enginediyshop.com | 1499.99 USD | — | — |