Ok so I got a this bike like 2 weeks ago from a guy whose wife rarely used it and its in really good shape evrything is all original including brakes and tires so I was thinking of taking it to a bike shop and getting up to date but now I'm wondering if I should maybe do a trade in? Can I go bike shops and see if we can exchange, a sort of down payment on a newer bike? How do I go about this? Are there any websirtes that may help me? Or do you know?