bomfire
The awesome web based utility powered by Octopart used to build a complete Bill of Materials (BOM) for all of your DIY needs.
I went to bomfire dot com and searched for some n-channel Metal Oxide Semiconductor Field Effect Transistors. Bomfire found me the lowest prices and built my entire BOM, faster than a DeLorean traveling back to the future and before I could even muster a "Great Scott!"