Wow, I'm looking at all the CCK mods and I'm scratching my head !
http://drupal.org/project/Modules/category/88

I've enabled option widgets.I've added the content taxonomy mod.

All I want is option checkboxes each with a different price. Similar to rifftrax, ie: dvd=$20 | mp3 = $5 | poster=$10

Here's where I'm stuck. After adding checkbox fields, the checkboxes just don't appear.