Ok, so, I have a little more clarity about their choice.Ok, so it's a hard shell sitting type, and a newer design, but they should be aware that by buying from an Australian reseller, they are literally paying twice the price that that same unit can be bought for from China. That chamber is NOT made in Australia, it's made in China, and the Chinese manufacturer is selling to that Oz company who are then adding about 30K AUS $$ to the purchase price.
You should send them this link for the same hard shell sitting type but with 2.0ATA, and tell them to ask for a price. I think they'll be surprised.
2.0ATA New Design Hard Sitting Type Hyperbaric Oxygen Chamber-Yilong Hyperbaric Chamber
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Firstly, there is a repayment plan and service and parts coverage.
Secondly, apparently in Australia you have to be an Allied Health professional to use anything above 1.35ATA which is then considered medical grade intervention. Naturopaths and physiotherapists are not covered by medical insurance liability. If you buy a unit for personal use there are no problems but to treat clients the liability is there.
Thirdly, it is a unit combining oxygen and hydrogen which has particular benefits that they have looked into and found appropriate. I am not clear on those details and have not looked into that.
At the end of the day, it's their choice and I do hope they will look at some of our information in the diet and health posts. There are some very informative posts including people's experiences with this equipment.