Musical Instruments Marketplace App

I'm looking to develop an online marketplace app specifically for buying and selling musical instruments. The platform will cater primarily to individual buyers.

Key Requirements:
- User-friendly interface for easy navigation and transactions
- Secure payment gateway integration
- Advanced search and filter options (by instrument type, brand, price, etc.)
- User profiles with ratings and reviews
- Messaging system for buyers and sellers
- Mobile-responsive design

Ideal Skills and Experience:
- Proven experience in developing marketplace apps
- Strong knowledge of secure payment integrations
- Expertise in UI/UX design
- Familiarity with backend technologies that support scalable applications

Please provide samples of previous work and a detailed project timeline.