This has nothing to do with postage though. They ship all their consoles from China, the postage probably costs more or less the same for each country.
Originally Posted by qrange
No, there are two main reasons for this, which are the taxes differing for each country, and the fact that they can make more money with price discrimination (why do you think they invented region lock?).
And honestly, Sony isn't THAT bad when it comes to this, PS3, PSVita and PSP games aren't region locked. Every single company does this, not just Sony. And they still use the region lock aswell (hello Microsoft).
Still, the real culprits for this are our greedy governments and their customs system.
PS3 Slim CECH-3004A 160GB
PS2 Slim SCPH-70004 - FMCB 1.8b