Isn’t that up to you to call the manufacturer and have them explain the warranty? If you purchase gear that’s more than 1yr old, I would assume there is no warranty. If you’re not the original purchaser with an original receipt, I would assume the manufacturer won’t honor the warranty. The fact you want to give the Seller negative feedback when you haven’t purchased the item or had any communication with the seller is dirty in my opinion. I do agree that the seller should have better communication and try to answer your questions. If you have zero communication, just move on.
Seller Silence
On two occasions during the past month I have posted a question to a seller about whether the item still has a manufacturers warranty. One selling an Aurender N20 and the other a JVC NZ700 projector. Neither has responded even though it has been a few weeks.
There should be a way to leave seller feedback before a sale to inform potential buyers of this issue.