BOW WINDOW PRICES

We have a very large ( 138? x 62?) 6 section bow window that needs replacing. We live outside of Philadelphia. The window is original to the house built in 1981. It is basically 4 lights of double glass, with 1-1/4? wood stiles in between each pane with casements on each end. Two of the sections have failed seals and it is getting iced up with this cold weather... Bow window prices encompass a broad price range, but the average price is $1,500 to $3,500 installed. Find costs and installation pricing.