I had considered a Duo sport when I bought my old Burley back in '90. I was a little put off by the mixte frame, and its smallish stoker length (my wife is 5'6") and went for the Burley. Very similarly fitted-out...sun tour, diacompe brakes, and 48 hole suzue hubs. The bike served me well for almost 20 years. The 48 spoke wheels are heavy, but are bulletproof. The Duo should be a great bike to get your feet wet with. As long as the suntour stuff works, I would avoid putting major money into it. If you have fun with it for a couple of years and decide to upgrade, you will be able to sell it very easily. You certainly won't lose money on it! When I sold my Burley Duet 2 1/2 years ago, I got $450. You should be able to get close, if it's in nice shape.