Values are estimates from recent comparable sales — condition, accessories, and included extras vary. Always compare before buying.
Selling your FlexRadio 6400? Run its Rig Check → Answer the questions a sharp buyer will ask and get a condition report for your listing — a fully answered report lets a truly nice radio demand a good price.
Median sold price per month, trailing 2 months. Down ~12% over the period.
Based on classifieds listings marked SOLD — asking prices sellers marked as sold, not confirmed sale prices. Refreshed daily from our deal-scan comp checks.
| Date sold | Item | Price | Status |
|---|---|---|---|
| Individual sold records for this model are still being compiled — the fair-value estimate above is based on 4 recent sales. | |||
No live below-market deals on this model right now — the good ones sell fast. Get the daily digest and you’ll see the next one before anyone else.
The FLEX-6400 is designed for the ham who is looking to operate the radio from a PC, laptop, Maestro, Mac or iOS client - either local or remote.
The FLEX-6400 is a software-defined HF transceiver from FlexRadio Systems, designed for amateur radio and other RF applications. It uses SmartSDR software to provide flexible, high-performance radio operation.
It supports HF bands, offers multiple transmit power levels, and includes both transmitter and receiver sections.
You can connect via Ethernet (direct link-local or via a local network) or USB 2.0. The manual provides cabling requirements and setup steps for SmartSDR installation.
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