I was thinking that there should be a plugin LevelII stack for each good, say used computer hardware.
you can hit someone's bid or put your offer away from last traded price.
I'm sure that for virtual goods, delivery is more fluid and there would be less of difference say for an identical configuration of a server, but one server with 8GB vs 16GB ram.
I've never played this (first time I've heard of it), but it sounds like a game I used to play about 5 years ago online with people on IRC/Kongregate chat. I used to love it and spend hours playing it. Boy do I feel dumb now not remembering it when the mobile app craze started!
http://www.yourtradingjournal.com/images/nt/NinjaTrader_clip...
I'm sure that for virtual goods, delivery is more fluid and there would be less of difference say for an identical configuration of a server, but one server with 8GB vs 16GB ram.