I noticed that the Trade Platform would not give me any compound (probably the most common resource offered by the trade platform) for solar dishes or wind thingys (the small ones.) I expected some loss of material, like maybe only getting one compound back per two(2) solar dishes, but even when there were 6 or 7 solar dishes offered, I couldn't get even a single compound.
The reason this is a problem is that now that I have a Printer, I'm replacing all my backpack-made energy sources with more efficient ones like the Solar Panel and the Wind Turbine. Without a trade-in available for these small things, I'm gonna end up with a bunch of junk taking up storage space or littering my area, and that just seems dissatisfying and unnecessary.
I think everything, both found in nature and fabricated by players, should have a trade-in value, even if it is depreciated from its original value.