I don't know anything about art, but houses have positive discounted cashflow - at least, they do in the UK. Old houses tend to be worth more than new ones, and

I don't know anything about art, but houses have positive discounted cashflow - at least, they do in the UK. Old houses tend to be worth more than new ones, and rents are currently going up steeply. Sale prices seem to be falling a bit, recently; but rising house-prices keep governments in power, so I expect the increasing prices to resume soon.