To convert my home theatre system Sony DAV-S500 from 220V to 110V, I asked Sony Ireland for the corresponding part. They referred me to some UK-outfit, that requires £108.- incl. VAT, plus shipping. Contacting Sony USA, I can get the same part there for $25.27 plus state tax & shipping. A difference of £108.- = US$198.70 - $25.27 gives the grand total of $173.40!