Just cause I couldn't stop myself from looking once I pulled up the page, here are SIX more choices all posted within the last day, most of which will likely be exactly what you need:

http://boston.craigslist.org/sob/bik/3217338382.html
http://boston.craigslist.org/nos/bik/3217313036.html
http://boston.craigslist.org/gbs/bik/3217127211.html
http://boston.craigslist.org/gbs/bik/3168132275.html
http://boston.craigslist.org/gbs/bik/3216808621.html
http://boston.craigslist.org/bmw/bik/3216373969.html

It is quite obvious you haven't even looked on craigslist. We have an extremely active biking community around here and craigslist here is a goldmine for used bikes. Don't squander that opportunity.