I too have bought from all over the world without a problem. My last large purchases from overseas were DACs from what is now branded as Musetec, the latest being the Musetec 005. Much has been written about this DAC here on this board. It's been around for about 3 years and no one has ever suggested that it needed service. Some years ago I wanted to upgrade my previous DAC from this company. It was easy to lift out its main board and send it to China at modest cost. The upgrade was done gratis.
The standard of construction of high grade Chinese components can be very high. Many of them are modular so that if anything goes wrong a relatively small part can easily be lifted out and sent in for repair or replacement after a discussion as to where the problem most likely is. Of course the owner has to be willing to open up the unit, and later put it back together again. But compared to components from the US and Europe, the values can be so good that the risk and effort is very well worth it. Also I, personally, have found very good support by email from this Chinese manufacturer (and a Korean one, SOtM, as well).