For electronics I would have to pay around 3% in customs fees and 24% vat... but there's exceptions. The law says that you don't pay customs fees if the value is below 45 euro, and also you don't pay customs fees if the products were ordered ONLINE and they're worth less than 150 euro... so yeah, you think the customs officer is going to try to prove the package was NOT ordered online?
There's also a rule saying you don't pay VAT for packages worth less than 10 euro... so if there's no invoice in the package, you can just say that multimeter was 9.90 euro
Romania is a member of the EU, right? Digital oscilloscopes and many other test instruments made in China are duty free (doesn't matter about the price). The amount that you must pay is based on the TARIC code (9030 20 30 90 for Chinese DSO) and tariff which you can look up at the Taxation and Customs Union site (the link is a for Chinese-made osciloscope):
http://ec.europa.eu/taxation_customs/dds2/taric/measures.jsp?Lang=en&SimDate=20121109&Area=CN&Taric=9030203090&LangDescr=enThe best thing is to do the research yourself, and then have the shipper put the correct TARIC code in the documentation (because customs officials are generally idiots). Of course, you still have to pay VAT on price + shipping if they check.
Correction: Reading through TARIC documentation, I noticed this:
"The TARIC DDS site allows searching for a product code based on its description. This function does not guarantee that a code retrieved in this way will be accepted by the Customs offices if used in a declaration."
Basically, it says that your local Customs office may screw you over. I think the best thing to do, if thinking of importing an expensive measuring device with 0% duty tariff (and you're not worried about paying VAT), is to FIRST contact your Customs office with the TARIC code and get them to either/disagree with the published tariff in writing; in other words:
"In order to obtain written classification information, it is advised to ask for a "Binding Tariff Information" (BTI) in the country of importation. Since it is the national customs authorities that are responsible for issuing binding tariff information, please send your request to the competent customs authorities of the Member State concerned. The names and addresses of these authorities can be found in the Official Journal of the EC C 126 of 23.05.2008, page 11."
But what's good about living in Japan is that mains is 100V and therefore possible order stuff from US.
This used to matter more (I know from being an American living in Europe), but nowadays almost everything important operates from 100-240V / 50-60Hz.