I hate to bring it up, cos it's a brilliant way of making cash, but TL 150 research missions really break the economy. Researchers can sell the cubes for 6k a piece and still turn a profit, and the mission runnners earn 10k per cube. This means its pretty easy to turn a few hundred thousand NC into a few million in a very short space of time.
Now I understand that missions still need to be around for all trades and that they need to pay fairly, but to me this just means huge amounts of cash is injected into the economy from the ether without much effort.
My suggestion to correct this is 2 actions. These could also be applied to other missions.
1. Reward for the mission is brought down a small amount to adjust for the realistic price of production. 6-7k per cube (18k - 21k per mission) should be enough reward so researchers can make money doing missions with their profession but reduce the amount of bulk cube sales.
2. The mission should generate a number of different varieties of BP requirement. So instead of its all being just a single type of v-hard-3 cube, after accepting the mission, you speak to the first guy, and he give you one of a random selection of cubes. This should be at least 5-10 varieties of mission item. This will prevent someone being able to buy a single stack knowing that they have everything they need for any TL150 Res mission for that faction.
Like I say, I hate to bring this up as its an easy way to make money which is great for an individual, but the economy of the game needs to be made more stable, and injection of funds of this degree is not a way to maintain this.