i cant be bothered arguing this anymore lol but you can just recover it right back and people change IP ISP ect so you could use a norway vpn / rdp to recover it. and if it is over 1 month+ your address will stand
you clearly have no idea how recoveries work ... no mather how long passes, an original owner will always be able to recover an account.
as stated above, lets say original owner lives in norway and buyer lives in USA.
buyer is able to recover lets say first time, everything goes well.
then 4 months later, original owner decides he wants his account back, he could use the same logic you posted but instead of saying he moved house, he'd say he got hacked X months ago and voilà, since he'd be submitting appeal from same location where he created the account, he would get the account back 100% chances,
then even if buyer has valid info, chances of him succesfully recovering from the original owner are next to none because every thing you do on your account (change email, submit appeals, etc,) is recorded by jagex so the jagex employee would just go in the account's "history" and see "oh, original claimed his account was hacked 4 months ago by some1 from USA" and see you are the same "hacker" and deny
the rule you are proposing would not really add anymore "security" to the seller's side but instead just make account selling/buying more tedious IMO