I've been bike riding for exercise for a while now, using an older 26" bike. Unfortunately, I have to conceed that I'm not really tall enough for a 26". I started riding one as a teen and so that's what I thought I needed but when we tried some trail riding today, I discovered that I need to go a size smaller to have more control of the bike. I'm torn between buying a new, light weight 24" or going with a used bike from craigslist or a consignment shop. I have thoughts of offering the larger bike for trade for a size smaller to someone who's kid needs a larger one or something. What are your thoughts on this? Is a new bike worth the price?