Speaking as one of the Legion of Bastards who never pay for shareware, I'm skeptical about this being a money-making venture. However, there have been surviving shareware companies in the past -- for example, Ambrosia wrote great shareware games for the Mac. If you can distribute a useful, non-crippled subpart of your application for free, then charge people for the rest of the program plus documentation, you might have a chance. Speaking from personal experience, giving someone a broken but complete version is just inviting them to "fix" it.
/s