Originally Posted by Bill Kapaun
I've seen some Wal Mart bikes on CL that were priced higher than in the store.
That's messed up, but I think I can do one better. A guy who lived in my dorm (who, BTW, always struck me as being too naive to be able to scam anyone) tried to sell his bike at the end of the year for $800. I don't remember what it was, but I do remember finding them listed new for about $200. I warned all my friends who were wondering if it was worth looking at, but I also had to figure out what he thought was worth $800 on it. He told me he had replaced a bunch of expensive parts including the seat (one of those gel ones that pinches your butt after about an hour) and a really fancy set of wheels (hmmm...single-walled rims, no-name hubs, and straight-gage spokes add $600 to the price.). Either his simple-minded appearance successfully belied his underhandedness, or he got conned really hard by someone else and still didn't realize it.
Anyway, to the OP. I second the other opinions offered that the best option is a craigslist bike. You can usually find something used, but in decent shape that will serve you well. Find one that fits you fairly well, as that can have a huge effect on comfort and ease of riding. If you don't find anything to your liking, a x-mart bike will also serve fine for commuting within a couple miles, but in general will be less comfortable and durable. If you do go with an X-mart bike, keep it simple. Something like
this