So, here's a question my paranoid mind is considering - what goods were the proctors for other teams given to sell? This is an event where Mist can give an advantage to their own teams by assigning proctors with easy to sell goods, and disadvantage others by giving them hard to sell goods (like drugs, in our case). We can presume this is no doubt the case. But another consideration is whether or not each team was given the same value amount of goods. Would Mist also advantage their own teams by not only giving them easier to sell goods, but a larger stock to sell from? On the other hand, if every Mist team over-performs due to something like this, it'd be a sign of some kind of overt favoritism, which would likely get complaints from the other villages participating - Mist has to at least appear to be objective.
Oh, one other thing - stealing the goods/money of other teams was considered as a way to boost our own score, but that would be invalid by the rules since it'd be us giving money/goods to the client.
Relevant to what I just said, it may also be the case that none of the proctors expect to sell their entire stock of goods, or even come close. Karina did say they didn't want to flood the market with this event. So there may be an expectation that only a couple hundred points would generally be earned by very successful teams. Our point total should be 600 + <whatever Karina got before the big sale> +/- Karina's assessment of our team's performance, which could well be far more than anyone expected any team to be able to accrue. (and as mentioned, the yaks may have overpaid - we did bribe them with explosive seals, which are expensive for anyone who can't make them, so they may well have been able to afford to do so)