https://www.ebay.com.au/itm/New-Sennheiser-IE-80-S-Adjustabl…
they seem to have a website but it looks fake..
https://www.austecdirect.com/collections/earphones/products/…
also this pls (different seller)
https://www.ebay.com.au/itm/Brand-New-Sennheiser-IE-80-In-Ea…
Likely to be grey market imports more than fakes but possible.
https://feedback.ebay.com.au/ws/eBayISAPI.dll?ViewFeedback2&…
If it's too good to be true… rule applies with such purchases.