Just thinking out loud.
Is plus valia based on the cadastral value and not what you may have actually paid for a property or whether you made a loss on that when you sold?
Saying that "acquiring residency first time can be done online" is completely false.
Reporting post as spam and misleading to boot.
When I bought mine (secondhand) in Elch I was not yet resident having only moved a couple of weeks earlier. I had however obtained my padron in preparation for my residencia application and that was all the dealer needed to register it in my name.