Just wanted to follow up on this thread and say that your advice was spot on. Last night we picked up a 23/21 1998 Cannondale RT1000 for $900. It's a great fit for us, and the stoker compartment is much larger than that of the Santana Nuovo Sport and Co-Motion Primera we test rode. Thanks again for the advice on what to look for--you made my craigslist shopping experience much less painful! And now we have $ left over to upgrade a few things.