Boltz prided itself on its modular, expandable system. While the company is gone, mixing and matching parts from different models can be tricky. For example, you cannot extend a shorter rack with a taller expansion kit. When buying, try to purchase a complete base unit. If you plan to expand later, be prepared to hunt for a matching expansion kit of the correct height, or consider buying the entire system you need in one go.
Here is everything you need to know about shopping for a Boltz CD rack, why they are worth the investment, and how to score the best deal. Why Collectors Hunt for Boltz CD Racks Boltz Cd Rack For Sale