I know nothing about bikes. I have always just used random mountain bikes on sale at the local store. I'm 6'5" and know I should be looking for a bike frame about 25" or 64cm. I just am wondering where to buy the bike? I'm mostly just going to be riding it to and from class just outside of Philadelphia, so I was thinking about a road bike. I'm not looking to spend more than like $700 on a bike mostly just because I'm not looking for anything fancy. Is there a good website to goto or should I just buy something locally?