Hiya,
why doesn't an equus count? If your only criterion is particular degrees of safety and if you travel light, then the extra speed of an equus is a safety feature that could be said to beat a privateer that has not been moderately SI-upgraded. A price tag of 45-50k could get you either a lowish SI privateer or an equus I would think, but they are very different in their functionalities (carried weight, crew, hunting options etc). Edit: I don't know if speed hacks/exploits have finally been removed by MA or whether equuses have ever been caught by such a hack.
Also to bear in mind at least is that MA have been promising changes to space for quite some time and the length of time that MA give for making a return on new introductions to the game has often been a couple of years. After that, better things may come along and lower the values of these. For space this might mean new ship types, but we do not know (as usual). On the other hand, changes to space may benefit an existing vehicle type/s. Personally I do think 2017 will finally see some changes, possibly big ones, so be aware of the uncertainties...