My husband and I are new to biking. We are thinking of getting used bikes so we can get a higher quality bike than the dept. store bikes without spending a lot of money before we see if we enjoy it. We saw an ad on craigslist for used 2009 fx 7.3 with 400 miles on it on for $350. I know used it retails around $600 but I wasn't sure how much the value decreases with time. Thanks for any feedback.