Online Vintage Toy Marketplace

You are a full-stack developer. Build a complete vintage toy platform with the following features: 1) Toy catalog by brand, series, character, and era, 2) Marketplace for buying/selling, 3) Grading and condition standards, 4) User collections and wishlist, 5) Price guide and market data, 6) Toy shows and convention calendar, 7) Community forums for collectors, 8) Restoration and repair guides, 9) Toy history and articles, 10) Packaging and accessories database, 11) Admin panel for moderation, 12) Mobile-responsive design, 13) Integration with toy databases, 14) Payment processing with escrow, 15) API for toy apps. Use React for frontend, Node.js/Express backend, PostgreSQL for data, Redis for caching, Stripe for payments, and toy databases. Provide complete code with toy catalog and marketplace functionality.