If I may suggest a few additional enhancements:
Partial offers would help everyone out. If a region lord puts up a buy offer of 1000 bushels, it's really frustrating when, as a trader, I can only find 900 bushels in range to broker against it. And I'm sure the region lord needing 1000 would rather have 900 than 0.
The market page should have a calculated value of all visible buy/sell offers--the total amount in sale offers, the total amount in buy offers, and the average buy/sell offer price per 100 bushels. That way region lords can decide to either put up a generous buy offer, if they badly need food, or they can put up a stingy offer if they can afford to wait. Same for sale offers--if they need quick gold, they can easily determine the going rate in the local market, or if they want more money, they can put a higher price on the food. (Note that this is based off of statistics of only the regions the lord can see--the 400 mile radius--not the statistics page).
