Steem Monsters - Impressive Start!
I'm very impressed with the game that 
One thing that I've noticed is there are people that are "offering" to sell you the monsters (that's 1/2 of the market), but no one is formally "bidding" for you to sell your extras to them (that's the other 1/2 of the market). In order to develop an active market, you need both sides developed. IE people can both buy and sell without having to "haggle".
2-Way Markets Build Activity Through Confidence
I have over 30 years of experience in the capital markets and will start to find a "2-way" market so that hopefully others can join in. This is just a test. I will start with the traditional wide spread of 1 by 2... I will accept orders of up to 10 cards on each side. I will group bids in the following 4 categories: Commons, Rare Monsters, Rare Summoners, Epics.
I will try to keep the markets liquid, and once I get enough price discovery I will tighten the spread. Remember this is just an experiment and I'm not sure we are ready for a 2-way market yet as most people don't want to let go of any of their excess cards. But I am testing it to see what happens, it never hurts to try something new!
I will start with the commons first... The price is good for up to 10 cards... Once you get confirmation of the order, then the market might be adjusted (I will reflect by updating the post)
Commons (Up to 10 commons per order) Updated June 15
Bid or "Sell Price" $0.0325 sbd
Ask or "Buy Price" $0.05 sbd
Rare Monsters (Updated June 15)
Bid or "Sell Price" $0.15 sbd
Ask or "Buy Price" $0.275 sbd
Rare Summoners
Bid or "Sell Price" coming soon
Ask or "Buy Price" coming soon
Epics (New Listing June 15)
Bid or "Sell Price" $0.32 sbd
Ask or "Buy Price" $0.60 sbd
Finally I will be happy to work with the existing volume dealers to include their inventory and tighten the prices. If you are interested in participating, I will explain to you how that would work!