FlexRadio Flex-6600
HF Transceivers
Current used market price and listings for sale — updated daily from 5 active listings across European marketplaces.
About this radio
The Flex-6600 is the higher-end model of FlexRadio's second-generation 'M' series, launched in 2018 as the successor to the original 6500/6700. It delivers 100W on HF/6m with dual independent receive slices as standard, letting one radio simultaneously monitor two frequencies or bands through SmartSDR — a feature the entry-level 6400M lacks. It's the SDR of choice for many contesters and DXers who want two-radio flexibility from a single box, and it remains one of the more sought-after used Flex models for that reason.
Median Price (last 90 days)
$2,199
+2.3%
Based on 7 listings
Typical Range (P25–P75)
$2,000
–
$3,358
Lowest Listed
$1,699
Highest Listed
$6,350
Price History
— Median price
▪ P25–P75 range
Current Listings 5
| Title | Price | Source | Date | Callsign |
|---|---|---|---|---|
| Flex 6600 w/ATU | $1,699 | QTH | 2026-10-28 | — |
| Flexradio Flex-6600 | 13,182 zł | EBAY | 2026-10-28 | — |
| Flex 6600 100W HF SDR Transceiver w ATU | $2,199 | QTH | 2026-10-20 | — |
| Flex 6600-M 100W SDR HF Transceiver | $6,350 | QTH | 2026-10-20 | — |
| FOR SALE: FLEX 6600 | $2,000 | QTH | 2026-08-16 | — |
No current listings found for this model.