I am very new to biking, and I have little to no experience with road bikes. I am interested in road biking, however, I do not know where to begin with my first purchase. I would like to stay under $400, but I also do not want to end up spending $400 on a bike and then having to upgrade within a few months of riding. I found these three bikes on craigslist. I plan on continuing to post more used bikes that I find online before making any decisions. Please let me know if these bikes seem like a good purchase for the price. I am about 5'4 and I believe my bike size is somewhere between a 50 and 53. Thank you!
Trek 2000 road bike - $375
https://greenville.craigslist.org/bik/5642547480.html
Trek 1200 Aluminum Road Race & Triathlon Bike - $300 (Rock Hill)
https://charlotte.craigslist.org/bik/5594170410.html
SCOTT SPEEDSTER 50 - $400
https://columbia.craigslist.org/bik/5634872282.html
Trek 2000 road bike - $375
https://greenville.craigslist.org/bik/5642547480.html
Trek 1200 Aluminum Road Race & Triathlon Bike - $300 (Rock Hill)
https://charlotte.craigslist.org/bik/5594170410.html
SCOTT SPEEDSTER 50 - $400
https://columbia.craigslist.org/bik/5634872282.html