Selling a high-value Pokémon card is exciting right up until you realize that a small piece of cardboard has to survive a shipping network and arrive exactly as described.
The biggest risks aren't always dramatic scams. They can be ordinary things: a card moving inside a package, a seller forgetting to photograph a defect, a label printed for the wrong address, or a dispute where neither side has good documentation.
This is the workflow I would use for a valuable raw card or graded slab.
Before the listing goes live
Identify the exact card. Set, collector number, language, printing and grade all matter. Photograph the front and back, plus corners and any visible flaws. If it is graded, document the case condition too.
Price using completed sales of the same version, not the highest active listing. Then calculate your net proceeds after marketplace fees, shipping supplies, postage and optional services such as insurance. The amount a buyer pays is not the amount you keep.
Choose a marketplace whose seller protection and dispute process you understand. Keep messages and payment on the platform. A buyer asking you to ship somewhere other than the transaction address should prompt you to check the platform's rules before doing anything.
Packing a raw card
A common approach is a correctly sized penny sleeve, then a rigid or semi-rigid holder suitable for the card. Secure that holder between clean protective pieces so it cannot bend or slide. Use a sturdy outer package with enough cushioning to prevent movement.
Do not put adhesive directly on the card or make the buyer peel tape across an exposed card edge. Avoid overstuffing a package so that pressure is transferred to the card.
Packing a slab
A slab needs protection against impact and abrasion. Wrap it to prevent rattling, add cushioning and use a rigid outer box. Check that the case cannot move freely when the sealed box is gently shifted.
Slabs are durable, but they are not indestructible. A cracked case can create a serious dispute even if the card inside appears fine.
At the shipping counter
Use the exact address supplied through the transaction. Select tracking and any additional services required by the marketplace's seller-protection policy. Consider the carrier's declared-value and insurance rules; coverage limits and exclusions vary, so do not assume that paying extra automatically protects every collectible shipment.
Keep the acceptance receipt and tracking information. Photograph the packed item and sealed parcel for your records. This documentation can be helpful, though it does not guarantee a claim will be decided in your favor.
After delivery
Do not delete your listing photos, shipping records or correspondence immediately. Keep them through the relevant dispute period. If the buyer reports damage, respond through the marketplace process and ask for clear photographs.
I would also avoid publishing a personal slab's full certification identifier unnecessarily. A buyer may need enough information to verify the card, but public posts and personal collection records have different privacy considerations.
There is no completely risk-free way to ship an expensive collectible. Careful descriptions, sensible packing and consistent documentation make the risks more manageable.