I'm not crazy about the fact that they keep your cards, I also like to use them for trading.

I took a long look last night and I noticed that they also had some pretty good deals on some wantlist stuff of mine.

It also seems like they nickel and dime a lot....If I consign a 5,000 count box full of cards, I see that they charge 1 cent per card per month for storage which means I would be paying $50/month just to leave everything?

Am I missing some advantages?

I do not believe you pay any storage fees on cards listed for $0.75 or less. If you have a bunch of cards that you would list for that price than it costs you nothing. All costs are paid by the buyer. For example, I list a card for $0.10 and COMC tacks on $0.25 for every card. Your card is listed for $0.35. You do not have to do anything else. When your card sells, you get the $0.10 you listed it for and COMC keeps the $0.25.

One point of caution. COMC charges a pretty hefty payout penalty if you want to cash out, I believe it is 20% of the cash value being redememed. So for example, you have sold $100 worth of cards and request payout. They keep 20% which means you really only get $80 back. If you choose to buy cards on COMC, then you keep the full amount to spend on cards. I don't mind this option as there are hundreds of cards that I would love to buy on COMC lol.