Just want to throw in and confirm what others have said - don't buy a low end bike, or even mid range. Get something that's good quality and slightly rare steel - @
SouthFLpix mentioned a LeMond, that's my "cool" road bike. It's not very rare or unique as some, but the tubes were manufactured in Great Britain by the Reynolds corporation, and the frame was welded up in Wisconsin. It's light and awesome
@
Wildwood nailed it by mentioning fitment as the number one thing. If the bike is too big or small, it's not going to be enjoyable no matter how pricey. Case in point I need to shorten the stem on my LeMond, because my crap beater bike fits a little better, and I'm not as sore riding the beater!
You should be reading and posting in the classic and vintage forum asap!