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yes, that would be possible and is an option for later. But for now I have focussed on other things first.

How about a market for even exchanges of cards? Instead buy/sell; exchange a Lord of Darkness for a Gold Dragon; etc. But, both parties pay a $4 fee to use the platform....or something like that.

This would be absolutely doable. The only issue is that you would need a central counterpart you trust. But on the other hand this is the same when you buy your cards through peakermonsters.com or steemmonsters.com - you also have to trust them. You would have to send your card to the market and specify for which cards you would swap them. The question is how many people would be willing to trade like this on an exchange. I am nt sure about this.

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