Craigslist should get you a decent bike. For example, I've got a three year old Giant OCR1 (no, it's not your size and this is not an ad!) that I've replaced. This is a pretty decent Shimano 105-equipped Al road bike in excellent condition and I doubt I'll ask more than $550 or $500 for it. It's winter, the economy stinks, demand is down. Shop hard. good luck