neb:
It's not uncommon to see TM property listings mention "RC issued, BC issued, vendor wants to sell". Why would someone go through the cost and hassle of getting all the paperwork done and then decide "nah, I'll sell it instead". And, conversely, why would someone say "instead of sorting out my own build to be what I want, lets adopt someone else's abandoned one"?
Run out of money to do it as things have doubled in price since they started it.
