Money of Doom is an ebook for 40 euros that explains how to open offshore accounts, protect your identity, etc, etc.
Sell hosted content online. Two simple pricing structures 5.9% plus 95c per transaction or 8.9% with a 75c per transaction minimum. Highly customised order pages.
Handy howto edit PDF metadata using pdftk. In summary: `pdftk file.pdf dump_data output file.txt`, `gedit file.txt`, `pdftk file.pdf update_info file.txt output newfile.pdf`
Simple site to sell downloadable content. Integrates with a few payment gateways, PayPal, google checkout, amazon payments, and probably others. Free up to $50 a month or 5% plus 49c (5c < $2) per transaction, in addition to any checkout fees I assume.