Yes you can sell without CE/FCC for unintentional radiators, and even self certifiy if a complaint is filed, and an investigation is launched, and the product is found to not be compliant, they could be forced to halt production, then fall in line with part 15 requirements.
Source: I googled your question.
I just checked the compliance marks which are acceptable for electrical goods coming into my state (NSW, Australia). CE is not sufficient.
Overseas Certificates of Approval and approval marks, such as the CE mark, are not acceptable in Australia.
http://www.fairtrading.nsw.gov.au/Businesses/Product_safety/Electrical_articles/Safe_electrical_goods.html#Acceptable_approval_marksThe mining hardware doesn't directly connect to the electrical supply, the power pack does, so it is the item that has to be certified, and you could simple go to the shop an buy one locally that is certified if necessary for insurance or whatever.
UL certification seems to be accepted in most of Australia.
You could run the device of a battery and thus bypass the definition in the regulations