Ask For Info about Cheap Replacement Windows. Window replacement companies will likely tell you all about a high-priced or middle of the road window. Ask them to talk to you about a window replacement that is a "step down" from what they are talking about. Indicate to them that you'd like their business, but that you have a strict budget that you will be adhering to. If the salesperson knows you will be stubborn on pricing, he will do his best to sell you on a cheap window (which will likely be what you are looking for anyway). These days, vinyl replacement windows are growing in popularity because they are energy-efficient and affordable. And fiberglass replacement windows are another great option if you're looking for durable, energy efficient windows.