FYI:
1. the message from Pinigis is an advertisement. he is the seller.
2. Citizen brand bikes ARE "Walmart quality" bicycles.
3. Schwalbe Big Apples are not heavy.
4. Philly craigslist is almost always loaded with good buys on high quality used folding bikes.
http://philadelphia.craigslist.org/bik/3861841975.html
http://philadelphia.craigslist.org/bik/3855818543.html
http://philadelphia.craigslist.org/bik/3859564894.html
5. Americans have forgotten how to haggle and bargain. don't be a rube. always offer 30% less than what the seller is asking with the idea that you will be happy to pay 20% less.