@gdinwiddie There’s really only two things that I can imagine an extraterrestrial being would want from us: Our dirt and/or our culture.
You can get pretty much all other types of resources from elsewhere in the universe. Water/Ice is all over, metals, gases, etc. Our decomp. organic matter is unique to our planet, as is our culture.
So basically our culture is worth as much as dirt (to an extraterrestrial)