A quick note on the topic of resins!
There are thousands of different types of resins. The tabletop game industry has about 30 or 40 different variations that I can think of used commonly. Some resins are super lightweight and very very brittle, others have a slight flexibility to them classified as "semi-rigid" that we are using ourselves that can withstand a crow bar beating on them (showed that on one variation we used) They also vary wildly in price for the manufacturer so that can play into the final cost of the models. We have finally set on what we believe to be the ideal resin and are using it going forward, started using it a few months ago.
I have no idea what version they are using, but i definitely do not want people to think that because a project is resin based it has amazing details but is super fragile. That MAY not be the case :)