Card shows can be useful for sealed boxes because multiple dealers may carry different products in one room. They also require careful inspection. Check the box title, year, language, shrink wrap, seals, dents, case labels, and whether the product matches the configuration you think you are buying. Use the events calendar to confirm the show details, then compare sealed options against local card shops if the price is not clearly better.
Ask the dealer where the product came from when it is older, expensive, damaged, or unusually cheap. Return rules at shows can be limited once you walk away from the table, so settle condition and authenticity questions before paying. The sealed box reseal guide and sealed expected value guide explain why packaging and opening value are separate issues. If your goal is one card, buying the single is usually cleaner than using a show floor to chase sealed luck. Treat sealed as a product to inspect, not a lottery ticket with better odds because it is in person.