I don’t see why it seems to upset some members here that others are willing to buy from Ebay.
For a pair of M90s my audiologist is quoting around £3,000. I have known my current audiologist for a long time and I know that he will provide great service and unlimited support.
If I look on Ebay UK then I can see used M90’s being sold for £1,150. The seller has good feedback and seems to sell quite a few aids but makes it clear that while there is a 14 day return option there is no manufacturers warranty. With the Ebay option you would then need to find your own audiologist to program them, use REM testing, supply the right side domes, etc. I guess that you would spend a few hundred for a reasonable service to cover you for the life of the aids.
To me, there is nothing wrong with buying an expensive item from Ebay without a guarantee - as long as you feel that the reduced price compensates you for the increased risk and you are willing and able to bear that risk (cost) if it breaks e.g. pay for a repair or simply throw it away and replace it.
It is up to each individual to make their own decision on which route to go down. The cheaper option has more risk but saves you around 50%.
If you are the kind of person who is risk averse and would be kept awake at night by the worry of owning aids that could break outside of guarantee - then simply don’t go down the Ebay route. If you are more savings focussed and willing to take a risk then go down the Ebay route.
Personally, I will go down the route of using my existing audiologist as he has provided me with great service over the years and the extra cost is not a significant issue to me. However, I would not negatively judge someone who chose to go for the Ebay option.