Earlier quoted context omitted.
You can't blame the sellers. They took whatever price they got away with. That's what they are supposed to do in a market.
Well, exactly. Here in the UK there are lots of people complaining that locals are being priced out of their own coastal towns, as city folk are buying up properties as second homes. But when the time comes to sell, those locals are perfectly happy to take the money. Most of today's problems are caused by people who want to have their cake and eat it.
I'm for taxing "nth-homes" exponentially to n. It would only hurt speculators who overall destroy value anyway. If you'll be using a house for two weeks a year, you should rent it.