All good stuff listed above...
And it's worth noting on the last point that some countries have a cut-off where any items below a certain stated value won't attract further taxes. It might be worth informing the seller of your country's particular limit and asking them to put the value at lower than this.
On the flip side, what happens if the package is stopped by customs, opened and they find that the 4Gb CF card you ordered is actually worth more than the stated $5?
- Ali