TCGPlayer charges sellers ~12.55% (marketplace fee + payment processing). This is subtracted from the TCG Market price when computing profit.

Which Cardmarket price to use as the buy price for arbitrage calculations:
• Auto: Uses avg (avg1/avg7) for high-velocity cards that sold in the last 7 days. Uses low for slower cards where sniping a cheap listing is more realistic.
• Always Avg: Uses the best available average sell price (avg1 > avg7 > avg30 > trend). Best for liquid cards.
• Always Low: Uses the lowest available listing price. Best for sniping underpriced listings.

Shipping is computed automatically based on Cardmarket DE→NL rates (source):
• Cards ≤€25: €1.55 (Letter / Standardbrief, non-tracked)
• Cards >€25: €15.49 (Registered Parcel / DHL Paket Online, tracked)
Note: 2026 UPU rules eliminated tracked letters for international goods. No middle tier exists.