Hi. I live in NYC and am considering purchasing a "vintage" bike from craiglist. Firstly, I know very little about bikes. Last summer, I found an abandoned bike that looked like it was well over 10 or 15 years old. It was one of those road bikes with thin wheels and was perfect for my height. The bike rode exceptionally well and I very much enjoyed it until it got stolen. Since I live in NYC, I have an advantage of tons of craigslist bike postings and would like to take those bikes into consideration. Some of these 'vintage' bikes are perfect for my height, have countless number of speeds, look (for a lack of a better term) perfect, and most importantly - inexpensive! I mean why would i shell out 600 or more dollars for a brand new trek bike when i could be perfectly happy with one of these vintage Schwinn (or treks)? Here is the only dilemma: I am perfectly fine if i get a bike that is in substandard condition; I am paying a low price for a used vintage bike, and i understand that. But will I be able to find wheels to replace the old ones? Will I be able to find a chain to replace the vintage one? My question really is: If i get say a Schwinn 'vintage' bike, are the parts manufactured by Schwinn today compatible with the old bikes? This question goes for all the major manufacturers. Will I be able to easily repair the bike if something should go wrong? And by repair I mean take it to a repair shop but be able to find and pay for the necessary parts? Thank you very much.