I'm looking for a used road bike. I'm 5'9 and I think i need a 54 (might be able to go a size up or down). So if anyone has anything lying around that they're not using let me know. I'm looking for something around the $300-500 range.
Do not go down a size! Try both a 54 and 56 to see which fits best. I am 5'8" and rode a 52. It was fine when I did short distances but when I jumped up to a half iron, I injured my hip and spent months in pain and physical therapy. If you buy a used bike, insist on taking it to a bike shop before you buy. I just sold my 52 and allowed the buyer to take the bike to a local shop where they assured her the bike was indeed in good working condition and was the proper size.
And you may need to increase your price point to $500-$700.
Thanks for the info! and I will definitely get any bike i'm thinking about buying checked out at a bike shop.