The current trading window makes it impossible to compare offers from different players with different units.
Is 60 coins for 5000 mead better than an offer of 70 coins for 6000 mead?
I suck at doing math in my head and I would rather spend time actually playing the game than sitting with a calculator.
Please add a (sortable) column to the trade window where you can see the unit price of what you buy. If it's not possible to add a new column then a tooltip would be OK.
Another thing I thought would be handy:
Make an option at the search box where you can specify if what you are searching for is something you wish to sell or buy.
If I search for "Coins" I get both types of deals when I might only want one of them.