Ultimate Inventory System – From beginning to end

The most complete inventory system perfect for Survival / RPG / OpenWorld games. It includes: Inventory, Crafting, Equipment, Vendors, Attribute manager, Level and skill manager, Resource pack, Pickup system, UI, Excel spreadsheets, and more!

Technical Details
Features:
Inventory system
Crafting System
Equipment System
Vendor System
Attribute Manager
Level and skill Manager
Basic Combat System as an example for the attribute display
Resource Pack
Pickup System
UI including theme changer
Excel import logic
Number of Blueprints: 79
Number of Meshes: 319
Number of Materials: 151
Number of Textures: 876
Network Replicated: Yes
Important/Additional Notes: This system is very extensive and there may be hard to comprehend for beginners.

https://www.unrealengine.com/marketplace/en-US/product/ultimate-inventory-system-from-beginning-to-end