Purchasing Xinyuan 10PCS/LOT SMK630 TO-252 SMK630D TO252 SMK630F SOT new original online, there are many positive aspects, but also a few disadvantages. Here are some tips to help you take advantage of buying online the next time you need an things item. One of the main reasons that people get goods online is to be able to compare prices more easily, and never having to visit many stores which may be miles apart. Online, you can compare prices on something all in the same browser. Another thing that can make your price comparison purchasing easier is to use price comparison search engines. There are sites like PriceGrabber and Nextag that screen a product and show you the rates and even the shipping costs to your location for as many as dozens or hundreds of completely different stores. These sites can be a real-time and money saver!