Yes offer was made through ebay message and I can definitely take screenshot of that if needed
The official reasons given is the item is faulty - however, i made it clear in the listing that the item occasionally shows err30 when shooting and will work when turning it off and on again.
He then tried to target the "occasional" word that i used by claiming thay error is showed after every shots.
But before making it public through ebay, he sent me private message saying error happened every 5-6 shots. Then offered to keep the item cheaply.
Edit to clarify: the err is truly occasional since there was no systematic pattern of when the err occurs, sometimes very frequently and sometimes none at all for a long period