There is no price put on it but a donation might be appropriate. here are some details I was sent:

"... a home brew TX for 136 KHz, which is currently visible on John's  website,(Yes, still existing) and which may be of interest to someone in the VLF community.  I suspect that the family would be happy to give it to someone who would give it a good home, albeit a payment might be a sign of appreciation.  We would expect the recipient to be electrically competent, as its safety has not  been ascertained."

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