F.R.C ET-20 Specific Low Power Radio 6 units Transmit/Receive but Used Junk Item

F.R.C ET-20 Specific Low-Power Transceiver Set of 6
Transmits and receives, but sold as used junk.

F.R.C. ET-20 Set of 6

These were found while cleaning out a closet.
Using the batteries I had on hand (3 AA batteries each), each unit powered on,
and I confirmed that they could transmit and receive from each other at close range.
I am unsure about the finer details of sensitivity.

However, there seems to be a difference in the volume of the received audio between units.
I'm not sure if this is within the acceptable range for the product itself,
but I am selling them as used junk.
(All units can receive, and the volume is at a reasonable level.)

On 2 of the 6 units (the bottom right two in photo 1), there are small cracks
in the plastic parts at the base of the antennas. (Photo 16)
Currently, the antennas open and close normally,
but this point also makes them junk.

The LCD display and button operations are normal.
On some units, the rubber covers for SP/MIC can easily come off even when inserted.
None of the 6 units come with belt clips.
None of the 6 units have rust in the battery compartments.
I am unsure if they have been opened before.

The exterior condition has minor scratches consistent with age. Please refer to the photos.

The items to be delivered are the ET-20 transceiver units only (6 units).
At the time of checking, each unit was transmitting and receiving,
but they are sold as junk due to the above conditions.

Will be shipped via Yuyu Mercari便 (Japan Post Yu-Packet Plus).
(Delivery will generally be by post.)
Thank you for your consideration.

Please feel free to comment if you have any questions.