One of the rare commercial C128 games, this boxed version of Infocom's Trinity looks like it's still got all the goodies. Better yet, this guy didn't list it under 'Commodore', but under 'Software-Other' so it won't see as much action. Maybe you can get it cheap. $9.99 minimum bid, with $3 shipping to US address.
http://cgi.ebay.com/Commodore-128-Trinity-Infocom-software_W0QQitemZ220155533162QQihZ012QQcategoryZ182QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
oops wrong page