
For most people, reptile racks are not necessary. They are generally only for those that like to keep a variety of reptiles, or for those that breed them. They are designed to create an assortment of separated enclosures in order to house multiple reptiles.
Reptile racks can be easily purchased, if you know where to look. These are generally not items that one will find at the local pet store and instead must be purchased from a specialist. Fortunately, there are a variety of online sources from which these can be purchased.
Of course, one can always build their own reptile racks as well. This is generally the less expensive option, but does take considerably more effort. Plan sets can be found online or sometimes through a local reptile expert.