I buy all of my components from ebay at a fraction of the cost of "reputable" suppliers - often the total price on ebay is less than the p&p from the other. I'm a tinkerer so cost is an issue but time is not. Most ebay sellers, particularly the ones in China, are so desparate to retain their positive feedback that they will refund small sums "at the drop of a hat". Most give free p&p, so spread your order around and don't spend too much with one. As to the fakes comment, most of the stuff I buy is so cheap, it's hardly worth faking. For instance I just bought a DS3231 on a board (with a AT24C32 as well) for £0.99 with free p&p and I'll bet you all the money in my pocket that if it doesn't work, I'll get a refund and won't be required to return the defective back.

@OldMarty That is contempt prior to investigation or you're just unlucky.