Best places to buy individual electronic parts like diodes, resistors, speaker parts …
- BG Micro
- Bitsbox [EU]
- Circuit Specialists
- Farnell [UK, Pricy]
- Future Electronics
- Mouser Electronics
- Newark Electronics [Pricy]
- Schukat [Germany, probably ship within Europe]
- Tayda Electronics
- Transfer Multisort Elektronik [EU]
Octopart lets you search and comapare prices among companies that supply electronic parts.
Futurlec is good if you can wait for a month (unless you are in Thailand). Their components are usually shipped out of Thailand.
Sparkfun has a great community.