I'm starting to look for a road bike. I've read all the reviews of the big box store bikes like Schwinn, etc. My question is what is the best deal for the budget I listed in the subject line? Can I buy a $250 Schwinn from Walmart and then pay a bike shop for an hour or so labor to "tune" the bike and if so is this a good idea if not please name some of the higher end bikes that I can watch for on CL or Ebay used. In my research I've read names such as Giant and others but some advice with names an model numbers from the veteran bike riders on here would be appreciated. I'm 5'-11" and 175 if that helps as I've also read where some bikes are more suited to taller or shorter people.
Thank you in advance, Charlie