Even if the buyer knew he was buying a clone recieber, you can bet he will deny this now that the reciever is bricked. All the rules are in the buyers favour all he has to do is say he didnt know the goods were counterfeit .
There are lots of people selling clone satellite recievers on eBay, as well as counterfeit goods. If you get away with it it's all well and good. But it is ilegal and against the Ebay rules, if you have any issues with the transaction and there is a dispute you will lose out.
Best course of action is not to sell any counterfeit goods on eBay.