@wolfie62 You are correct that ”I don’t like it” is not the same as “not as described.” But all the buyer has to say is that it isn’t working properly and he will automatically be given a return authorization. That apparently is what happened here, because the OP says the item is now marked ‘Returned.’ The OP will be getting it back soon, so there’s not much room left for discussion with eBay. The buyer will get all of his money back. eBay is not going to use their money to compensate the OP. eBay doesn’t have the capacity to evaluate if an item isn’t working right. THEORETICALLY, a brand new sealed cartridge when opened and used could have a defect - right? I’m not saying it’s likely or happened in this case, but am just pointing out that eBay doesn’t evaluate that level of detail.
For the purpose of looking at this in another direction - if a seller had a cartridge that looked brand new, but was defective, and sold it on eBay - what happens when the buyer tries out the cartridge? He has no ability to prove that it was bad when he received it. So in this sense, eBay always finds in favor of the buyer.
It can even become worse for sellers. Such as damaging an item in a way that doesn’t show up on the original photographs. Hopefully the OP gets it back in good shape.
@ashoka As far as PayPal, they follow the same system of supporting the buyer. There’s no interest in delving issues concerning defects, although you might better argue your case where there is VERY CLEAR photographic proof supporting your position.
All of these procedures are automated. Perhaps very expensive items over a certain amount are handled differently. But I have never sold those types of products on eBay.