The only way to do that is to use a credit card from AR to make a purchase so you can lock your account to AR with the billing address. But, since there is no virtual CC, as far as I know, it means that one card would be used on MANY (God knows how many) accounts and Steam can mark all or most of those accounts linked to that card as potential fraud and ban them + they will blacklist card too. You never know if it's going to happen after how many accounts funded with that one card so me and my partner don't want to risk it.
That already happened to some Steam members, it is just a matter of time when you are going to trigger the security system.
Check here: https://prnt.sc/vgxo0p and here https://prnt.sc/vgxn4l
So, nope I don't want to put anyone on such a risk that can lead their aged accounts to end banned.
Also bump, have AR account with 200 ARS in stock.