eBay said they have authentication procedure for watche above $2k....
But when I see some of the fake Patek Philippe listings...I shake my head.
They should first authenticate or prohibit the listing of fake watches in the first place and not waste people’s time.
What if seller said they didn’t receive the watch or denied they signed for it? Nowadays delivery to wrong address do occur. This will be messy.
Therefore, like you said, I rather deal with reputable cmpanies with a brick and mortar storefront.