You should not go merely by the model and specs of the machine. There are two types of units available in the market. One is complete system that is used as units. The other is the refurbished unit that does not have any serial number in the bottom of the machine or in the bios.

Units such as this would be available at very good and competitive price and they are available in great condition. Only problem for you would be that you may not have the technical supports from the manufacturer company. That is why buying used Dell may pose problems for you. There is no warranty for the machine either.

However these disadvantages would be minor compared to the benefits you derive when you buy such used machines. With the right seller these machines could be great for you both in terms of prices and in terms of services provided.

If you are making the payments either with international financial services like Pay Pal or with credit cards it will be good since you will have the coverage of charge back protections provided by the credit card company. Also it is good to check the feedback on the seller when you are buying some used products including Dell PowerEdge Servers or any such items. Also try always for direct contact with the seller instead of going through some intermediary that could save you a lot of money.