Best Place to Sell Cards
 

I typically use ebay, but 12.55% in fees is outlandish. It seems that COMC is cheaper, but takes much longer to submit and sell cards.

I came across Bonanza, which has many card listings. But, I'm not familiar with this marketplace and don't know how reputable it is.

Suggestions for any other sites/marketplaces? Or any additional info on Bonanza?

Thanks

I sold a few cards on Mercari. It's alright but nothing special. Their shipping label system is wonky and I couldn't figure out a way to get it to ship anything other than first class with USPS. UPS and FedEx were also options but not using those for a single card that sold for $15.

You lost me at 12.55% being outlandish for access to millions of buyers. But explain what you're trying to sell (price range, sport, condition/graded?, quantities) and you'll get a much better response.
There are different answers for $1, $10, $100, and $1000+ cards and depending on the amount of work you want to do yourself vs. offload.