I think you should be able to have the OPTION to either sell the blocks in that movecraft vehicle your gonna sell or just pay for it to scrap it and you keep the blocks.

But I do like the idea of a higher tier dye extractor

The problem with this suggestion is the following:
In the real world, Materials such as Steel and Iron were hard to come by, and therefore it makes sense people would pay to have the ship in its own right in order to scrap. On CCnet however, Terracotta and Concrete is not rare, and it is the labour hours that contribute to its cost rather than rarity. Secondly in most cases, governments would employ and therefore pay people to scrap the ships in order to sell the materials, so even if your idea was applicable, it would still be wrong as you are selling the material and buying the labour value.

Ontop of that, Dye extraction and logistical processes should not be messed with, they provide opportunities for employment and things to do. I think it would be better if dye extractors had more slots per machine and worked faster.

Governments still profit from selling scrap, which just doesn't happen in CCNet so there should be some other way.

Plus nobody "eploys" people to scrap, they just have some rando do it and it's annoying and burdensome for everyone