A used one. Try Craigslist. Last year I got a $1000 mountain bike, nine years old on eBay for $250 including shipping, a 1998 mountain bike for $120 on Craigslist, and a 1960's tandem bike for free from my neighbor. A new Dahon folding bike will run you over $500 bucks. A new one for $150 like this Schwinn will be junk: http://www.amazon.com/Schwinn-S2278-Hinge-Folding-Bike/dp/B000Y2ZFQ8