Bottom line: budget the AR price plus overhaul and re-certification, then compare with a serviceable unit.
65-46108-21 is currently available in As Removed condition only. AR units come from aircraft teardown, priced well below serviceable stock, but they need inspection, trace review and re-certification before installation.
Listed AR pricing: $15,000. Budget that plus overhaul and re-certification, and ask the shop for turnaround time before you commit. For non-urgent needs this route can cut cost significantly.
Create your free account and unlock automated quoting, real-time inventory, and part sourcing across your entire supplier network.