Further to the trading outpost, there are two subsystems to consider, Barter and Negotiate. Both of which operate differently, involving offers instead of bids.
Barter involves an opening asking price, but includes a range with a possibility of taking offers instead of buyout prices. The range can be independent of asking or buyout prices.
Negotiate is principally for larger stacks of items, where part of the whole of the sale is an exercisable option, so it is possible to buy out say, 5 of a stack of 100, possibly for a different price. Barter and Negotiate are both options to consider when selling.
Trade offers more incentives for exchange, and should be able to offer the possibility of selling a “Lot” listing, where items, consumables, cosmetics, whole or partial set items, etc can be listed together. Trade also needs to be able to offer Item for Item transactions instead of exclusively Item for Currency. So, equivocal values of exchange principal need to be able to be listed and easily derived so that matching collateral can find its way easily through the market.
Trade also means heightened security and advanced routines to prevent dupe/spoof items to protect liquidity. Legitimate, canonical advancement should be the only means of measure.
There is also something about the WebViewer for the demo software we had done up a while ago, where the player is able to view their item listings and browse for items. No one is able to list or sell using the WebViewer.