Register for a Superbuy account using your email address or social media profiles. The platform's interface supports multiple languages including English, Japanese, and Korean. Before proceeding with purchases, configure your shipping preferences and notification settings within the account dashboard. Ensure you review their service fee structure, which typically ranges from 5-10% of the product value depending on the purchase amount.

Step 3: Order Processing Protocol

Submit your selected 1688 product links through Superbuy's purchasing form. Include specific sizing requirements and color preferences in the remarks section. Superbuy's procurement team will contact the supplier to verify stock availability and production timelines. For vintage baseball jerseys, expressly request detailed craftsmanship photos before they proceed with payment to ensure accurate logos, numbering, and material quality.

Step 4: Quality Assurance & Warehouse Management

Upon receiving your items at their Guangzhou warehouse, Superbuy's inspection team conducts meticulous quality checks. They provide high-resolution photographs from multiple angles, allowing you to verify stitch density, fabric authenticity, and print quality. This crucial step prevents receiving substandard merchandise, with their experts specifically checking for common issues like misaligned patches, irregular sleeve lengths, and color fading in vintage-style reproductions.

Step 5: International Shipping Considerations

Superbuy offers multiple international shipping options including EMS, DHL, and SF Express. For single jersey purchases, economic air mail typically costs $15-25 with 15-25 day delivery windows. However, bulk purchases (3+ jerseys) benefit from consolidated shipping where per-unit costs drop significantly. They handle customs documentation and declare reasonable values to minimize import duties. Ensure you select appropriate insurance coverage, particularly for limited-edition collectibles.