You can surely find help with the price compare tools on the Internet to find the best prices.
Be careful from some "bad reputation" shops (late delivery, bad customer services...). You should prefer reliable sites like Amazon.
You can compare prices before your shopping on:
Of course like a lot of objects, especialy including technology, breakdowns can occur. So it should always be easier to buy it in a shop close from you, where you could bring it back in case of problems.