If they are not original then they are fake. Fakes are not allowed on ebay or anywhere as they are illegal
Did they have a brand name on them at all or did you say "like" or similar
You can not campare an original price with the price of a fake
You can not put on the listing " Sold as Seen "
How can they be bought sold as seen if you are posting them
If the buyer claims not as described then you do accept returns
We all do
The buyer opens a dispute for not as described and once they do then you send a pre paid label for the return
Once you have your item back then you refund in full through the resolution centre
