I cannot see anywhere, either in game or on the store, giving how long the sale is on for.
Thanks to this sale, I can afford the survey ship kit for one ship, to use on DW3. I have not yet decided which will be my main ship, however: the Anaconda can do anything but I prefer its appearance without the kit; the Corvette has everything but jump range and I really like the look with this kit and the Python is in between the two and also looks good with the kit. (To complicate matters further, I have been enjoying flying the Cobra MkV so much that I may yet make that my main exploration ship).
Of course, I could bring all four ships along on one of the official carriers... .
EDIT: got it for the Corvette, as it suits it so much better, although I'll probably only be using it for hauling/mining on DW3.