Not just the viper IV, pretty much all the ships which weren't in-game to begin with. Asp scout, viper IV, imperial courier to name but 3.
That said, i did put the black friday on the Python, looks good. I thought you had to have done something to get that, like purchase horizons at a particular time, but maybe not.
My favorite ship at the moment! I have this at the moment. My only problems come from taking on wings of multiple ships where one of them isn't something I can drop quickly like a sidewinder or eagle, or if I get overconfident. Just keep putting pips into shields when you're taking fire and then putting it straight back into weapons and laying on the hurt when you can, if your priority is keeping your shields up then you can do quite well in dogfights. The hull strength is very very nice too, you can usually stay in the fight for quite a while and the extra strength helps with that tense escape when you're waiting for the FSD to charge. I use mine for hopping around a few local systems to do assassination missions, get involved in civil wars and hunt bounties at a compromised nav beacon.