Retrofit windows

I agree that some of these window replacement companies either do substandard work or over charge........ I put all new Anderson casements and a bow on the first floor of my house when I did a inside and outside renovation......So that was earlier nineties. About im going to say 20 years later this guy shows up and wants to sell me replacements......My house is immaculate and I look at the guy like are you blind or what....... I tell him I just replaced every window in the house 20 years ago, everyone a Anderson and not replacements, new construction units, not cheap ****
Guy says oh well how long do you think they last? I told him you tell me and whats the problem with mine that you think I need to replace them...... No answer...... Thanks for stoping by......