In reply to Radioactiveman:
> Also bear in mind it can also make warranty claims difficult or impossible depending on what you buy.
Nope, as if you fill out the proper paperwork when ya sent the warranty items back, you will not be charged VAT nor duty (ie. you need to prove you have already paid VAT & duty on said item once).
Oh, and the value marked on the CN-22 (customs declaration sticker) is not worth a dime. It's just a starting point. If you can provide the actual receipt, the duty an VAT will be calculated accordingly (I would only suggest doing this, if the value on the sticker is greater than what you actually paid though). How hard this is, depends on who is handling the import... Proper parcel companies like DHL and UPS are a lot more easier to deal with than (Finnish) Post. It also might be, that you have to do all the customs declarations yourself at the nearest customs office (in which case you won't be charged, but it will eat a lot of time... or atleast can be time consuming).