When you buy anything secondhand, you typically want to take even more time to go over that item from end to end, ensuring it's in good working condition and is the right choice for you. This is especially true of a used handgun; if you're buying it for personal protection, you want to know that it won't jam or otherwise fail right when you need it and know that it will be easy for you to maintain and clean as needed.
Having a new tennis court installed at home can mean time to practice or play whenever it's convenient without worrying about paying club dues or waiting for a court to open up. However, this also means that you may need to make some decisions about its installation, including the surface of the court. Note a few tips for selecting the surface of a new tennis court you'll have installed at home and then discuss these with a tennis court builder to get their input.