Our old wooden double-hung windows are about shot. DW says she might throw me through one if we don't do something about them. She called a company and a salesman came out and gave us what I believe is a very high estimate. The windows are high quality, but I can't see putting that much money into this house. I priced the highest-end vinyl replacement windows at our local super hardware/lumber store and I can buy and have the windows installed for less than one-half the price of the fancy window place. If I install that drops to about one fourth the cost. The windows are ThermaStar by Pella. Has anyone bought these windows? Installed them yourself? Any information would be appreciated.