Antennaes can be reused, but radio units and baseband units cannot, and those are by far more expensive. For example, a C-band array of radio units and baseband

Antennaes can be reused, but radio units and baseband units cannot, and those are by far more expensive. For example, a C-band array of radio units and baseband unit can cost upwards of $80k, while the antennae are a few thousand at most.