Also note that it states that there will be changes to the xp curve, this may be from xp per minion or amount of xp needed.
K - looking at what was happening with the market last night there's a lot of money to be made selling Scientific theories (for example) were going at silly prices, 6-10K per item. I reckon there's a good chance that this situation will continue to the weekend and early next week so stashing stuff to sell at the weekend will be the order of the day, conversely trying to buy anything good will be like pissing in the wind so save it for next week.