Apple's Mac minis are being sold out due to shortages, with the base model with 16GB RAM and 256GB of storage sold out. This has led to a secondary market for these machines, with various configurations available for sale at higher prices. The shortages have since extended to other configurations, regardless of the memory selected. The shortage also coincides with an industry-wide memory crunch and plans for a Mac mini refresh. As of Friday morning, M4 base models with the 16B RAM/256GB configuration were selling at mark-ups like $715-$795 for a new, "open box" model, and as high as $979 for an excellent refurbished version. However, the demand for the device is expected to keep prices up until Apple's supply chain refreshes.