Vintage Numismatic Shopify Store Design

I'm seeking a skilled Shopify designer to create a vintage-themed numismatic store. The store will feature a coin catalog, membership area, and online auctions.

Key requirements:
- Vintage and classic design aesthetics
- User-friendly navigation
- Secure payment gateway integration
- Mobile-responsive layout
- SEO optimization

Ideal skills and experience:
- Proven Shopify design experience
- Strong portfolio in vintage/classic themes
- Knowledge of e-commerce best practices
- Familiarity with numismatic market trends is a plus

Please provide a portfolio with your bids.