destroyed weapon mounts
do note that destroyed/downsized weapon mounts isn't actually a normal d-mod, it's built directly into a predefined d-version of the base ship, which means it can't be repaired/removed. those ships are meant for pirate fleets and cheap(er) market offers, they aren't generated by recovering a previously undamaged ship after it's been disabled in battle.
in 0.8.1, the difference between those predefined d-hulls and the randomly generated recovered ships with d-mods will be made a bit clearer.
real issue is long list of brand new hulls for sale, after complete fall of humanity, brand new hulls should be non existant and unavailable on open market at all.
everything that fly around should be tens of cycles old.
new hulls should cost 10 or 20 times more then degraded ones.
not really, there are still quite a few autofactories around that continuously manufacture new ships in pristine condition, and all they need is a blueprint and the required raw materials.
what
are rare in the post-collapse Sector are entirely new ship designs. almost all ships designs (in vanilla) have either existed before the gates closed, or are relatively simple modifications that are applied after the automated manufacturing process (like the Tarsus-to-Condor conversion, or the slightly beefed-up Shepherd). this is because the autofactories work just fine with old blueprints, but creating or altering the blueprints themselves is incredibly difficult with the current technology available in the Sector, as is manufacturing ships from scratch without the help of the old autofactories.
this is perhaps the primary reason (as far as lore is concerned) for why repairing a heavily damaged ship is often more expensive than just buying a new one: most repairs are done by human engineers and laborers, whereas most manufacturing is done fully automated.