I learned a cunning (probably UK-only) technique the other day.

In the UK you have to pay "stamp duty" when you buy property. On a property over £1m in value, it's 5%. So if you have a fancy £5m apartment in London to sell, that's a not so fun £250k stamp tax for your buyer to pay. What to do? People are transferring the ownership of such properties into corporations and then the "homeowner" only has to sell the shares of the corporation to transfer the property rather than the property per se (stamp duty on shares is significantly lower than on property). Someone then obviously pockets the difference.