I am sorry ^^ English is not my mother tongue so not everything might be right in my sentences.
Well you don't have to be a house seller but I find it funny that you are so against punishing sellers if there is nothing negative for you. ^^ Why would it be bad if they truly will be punishing them if you are not interested in selling houses some where down the road? Its like in the topic I linked where you first said that people just should use their FC rooms if they want housing so bad because there is nothing interesting there to need private housing and later saying that you even have four houses.
@ Dzian: But now you will get a lot of your gil back if you wait those 45 days. It might not be everything and you wont get back those more rare items but you will lose them anyway. But if you sell your house this will mean double the price for the buyers (min.) and they don't even have the security to know that it will be theirs after they paid you the money.
The best would be if SE would have implemented a system where you can have only one private house per server and that there would be a NPC that you can sell your house back to with maybe a very little fee for doing so. You get your money back, another person can just purchase the house again and nobody would be able to sell those houses to others. (Maybe you can only give it up by talking to that NPC) I still don't know why they never thought about the possibility that this might get exploited by the players...