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COMC versus Ebay
Compare	COMC	Ebay
Verdict	Depends	Depends
Best for	Collectors selling large card inventories	Casual sellers of used goods
Who it's not for	Sub-$10 card flippers, fees erase the margin	Low-margin, high-volume new-goods sellers
Privacy	No known public vulnerabilities found in the sources reviewed.¹²	Mature platform with real breach history: 145M users notified in 2014; recent CVEs mostly hit third-party integrations.
Support quality	Shipping-delay and BBB complaints recur	Users hunt for real human support
Public sentiment	Opinion splits sharply: bulk sellers and buyers praise the warehouse convenience while fee-sensitive sellers and detractors are harsh critics.^²	Sellers complain about stacking fees and buyer-favoring disputes, while buyers praise reach and bargains but find support hard to reach.¹⁵
Biggest gotcha	Storage fees accrue on inventory that doesn't sell, dead stock costs money^⁷	Per-sale final value fees stack; cheap items can lose margin after fees and shipping

Pick COMC when

Collectors selling large card inventories
People tired of packing and shipping individual cards
Buyers hunting singles across sports, TCG, comics

When COMC is not a fit

Sub-$10 card flippers, fees erase the margin
Sellers who need every dollar of the sale price
Anyone unwilling to mail their collection to a warehouse

Pick Ebay when

Casual sellers of used goods
Collectors hunting rare items
Hobby resellers and flippers
Buyers wanting auction deals

When Ebay is not a fit

Low-margin, high-volume new-goods sellers
Brands wanting direct customer relationships
Anyone needing guaranteed human support
Privacy-sensitive users wary of breach history

Sources

Read Customer Service Reviews of comc.comtrustpilot.com
review
Experience with COMCreddit.com
review
COMC rantreddit.com
review
How do people make money selling cheap cards on ComC?reddit.com
review
COMC's Rising Fees: Impact on Collectors and the Hobbysumly.ai
news
COMC is overcharging TCG sellers through eBayblowoutforums.com
review
What are the Storage Fees & Enhanced Security Fees?comc.zendesk.com
official
What Happens Once My Cards Arrive at COMC?comc.zendesk.com
official
COMC, taking money but not shipping, are they in trouble?forums.collectors.com
review
COMC | BBB Complaintsbbb.org
review
Beckett suing COMC over databasefreedomcardboard.com
news
COMC Vulnerability Disclosure Policyblog.comc.com
official
CardSource.ca vs COMCcardsource.ca
review
Selling with COMC Auctions vs eBaysportscardforum.com
review
Trustpilot reviews of ebay.comtrustpilot.com
review
eBay on G2g2.com
review