- This would delve into the methods collectors use to verify the authenticity of items, such as looking for certificates of authenticity (COAs) and consulting reputable experts. 3. **What factors influence the value of Marvel memorabilia over time?

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- This would delve into the methods collectors use to verify the authenticity of items, such as looking for certificates of authenticity (COAs) and consulting reputable experts. 3. **What factors influence the value of Marvel memorabilia over time?