Overnight in a sort-of bad area of Chicago, both of my bike tires and my seat were stolen off of my 7-moth-old Schwinn (at least the thieves were nice enough to leave the frame -- thanks u-lock!). So now I have to contemplate whether or not to get a new bike. What would be the ballpark cost to get this one up and running again? Like I mentioned before, it needs two new tires and a seat. Or should I just get a new one? Any suggestions would be much appreciated. Also, for other Chicagoans: Any bike shop recommendations?