Oh btw this is a common phone now. You can buy it at many mobile outlets. I saw it @ MC very recently. Just pay a visit. However the normal price is surely above 55k these days.
if its for 25k its really really worth machan. Try the code *#06# on that phone. It will give a code. In that code if the 7th and 8th digits are either "01" or "10" or "00", then never be afraid to buy that phone. Its completely safe.