Probably can buy missing piece.
eBay
New 3mm One-Piece Acrylic Display Box for lego 72046 Game Boy Model Display Case Storage Box Organizer(Lego Set not Included)
Aliexpress UK
Title - City - Ocean Mini Submarine. I do a bit of collecting as well as trying to satisfy my young sons enormous appetite for Lego. Used but not abused, all my sets are in good condition. Instructions - None but can be found online and downloaded.
eBay
Acrylic Display Box for Lego 43014+43022 Racing Team Helmet,Display Case Dustproof Showcase for Lego Model(Model Not Included)
Aliexpress UK
Explore the depths of the ocean with the LEGO City 60263 Ocean Mini-Submarine set. This immersive set features 41 pieces that will allow you to construct a detailed mini-submarine, perfect for LEGO enthusiasts and ocean lovers alike. The set is part of the LEGO City theme and is suitable for children aged 4 and above. The mini-submarine is perfect for play and display. The set comes with a range of colourful pieces, including a minifigure, fish, and sea creatures, which will provide hours of imaginative play. Plus, with the inclusion of a National Geographic label, this set is a must-have for any LEGO collector. Get your hands on the LEGO City 60263 Ocean Mini-Submarine set today and embark on an underwater adventure!
eBay
Gobricks GDS-1227 Wheel 56mm D. x 34mm Technical Racing Medium, 6 Pin Holes compatible lego 15038 pieces of children's DIY
Aliexpress UK
The LEGO Deep Sea Collection Building Set 60263 is a city-themed LEGO set released in 2020. This new sealed set includes a mini-submarine and a total of 41 pieces. Designed for ages 4 and above, the set features an ocean exploration theme, making it an exciting addition to any LEGO collection. With dimensions of 155mm in height, 327mm in length, and 196mm in width, this set offers hours of creative play for LEGO enthusiasts interested in underwater adventures.
eBay
Gobricks GDS-M174 Hinge Plate 1 x 2 with 2 Fingers on End (Undetermined Type) compatible with lego 4276 Assembles Building Block
Aliexpress UK
Complete with instructions and box
eBay
Gobricks GDS-1089 Technical, Brick Modified 2 x 2 with Pin Hole, Rotation Joint Ball Half compatible with lego 48170
Aliexpress UK
New, sealed in box. Box has heavy shelf wear.
eBay
Gobricks GDS-604 Technical Pin Connector Round 1L [Beam] compatible with lego 18654 children's DIY Educational Building Blocks
Aliexpress UK
With a focus on vehicles and airport activities, this complete set provides hours of imaginative play for young Lego enthusiasts. I believe this set is complete - it looks as if all the parts are there.
eBay
Gobricks GDS-923 Technical,Pin 3L with Friction Ridges Lengthwise and Stop Bush compatible with lego 32054 DIY Educational block
Aliexpress UK
The LEGO CITY High-speed Chase set (60138) is a part of the LEGO CITY theme, released in 2017 with a total of 294 pieces. This set includes a high-speed chase scenario, featuring a police boat and a speedboat, providing hours of imaginative play for children aged 5-12. The set also includes minifigures and accessories to bring the action to life, making it a great addition to any LEGO collection.
eBay
Minifigure Display Case for LEGO Action Figures Blocks,Clear Dustproof Acrylic Display Box Storage with 3 Movable Steps Gifts
Aliexpress UK