I don't mean to be a commercial but Good Old Games just put the original Tropico, the Paradise Island exapansion, and Tropico 2 Pirate's cove on sale as a bundle for $7 (normally $10). In addition to two games and an expansion you also get the soundtrack.
FOR SEVEN DOLLARS.(Sale price reflected in cart.)
Act fast, this is a weekend sale. UPDATE: I had some issues with this, but in the end all is working well. See the comments for all the details.