When you finish contract 13, you are rewarded the prototype. This is placed onto the contractors station. At this point the next contract is to sell the prototype on the station not the reward which I have also sold. I have sold both prototypes. although contract tells me to sell the station prototype. which I have done. but it is here the problem stands. I have set up a ticket for this. I can after looking in Christopher's shop purchase another one, but that will again take a long time and as I have already completely finished the required contracted, why should I have to.