Its really hard to find a genuine buyer and saler in the market for selling or purchase a second hand products. And because of online buying and selling ( used product) now we dont have to go any where it can be done just on your finger tips because of online buying and selling there is no middle man in between buyer and saler. And with the help of ( gprs) we can even find buyer or saler near our location I had buy 4 gb ram of ( ddr3) at just 1100 rs. Before I was having only 8 gb ram ( ddr3) and now adding this 4gb ( ddr3) it become 12 gb ram am very happy and my pc is really speed up now. Really nice app.