But you could easily do it now, for almost zero dev overhead:
Inter Astra for new ship sales
In ship UI for 'used' ships.
Or keep them for black markets perhaps.
You could also make anarchy shipyards popular by keeping these partially upgraded ships available there only (or that the RNG favours less regulated space).
You could also have trade offs: for example a G5 FDL with juicy upgrades might come up cheap, but has a bounty on it (still possible with the 'new' C+P rules?), or, buying one triggers a one off mission (so ships have a 'backstory' of sorts).
A bounty hunter might recognise the ship (i.e. it comes with notoriety)
Link the ship to more favourable POIs in that system- for example, you buy the ship and a message pops up (say, from a computer record) that generates a POI on a planet which might be some 'buried treasure' (like the mysterious stranger tip offs).
A particular pilot NPC might appear that us high ranking but cheap.
These would not be earth shattering, but would add some playable fun to what normally is a 'click / done what next' thing.