I bought 6 BIN glasses on Ebay as a present. When they arrived the invoice said 6 for 4, which it didn't mention on the listing. Price was as I expected.
That is a by-the-bye however.
When they arrived, two were smashed. All they had done for protection was open the manufacturer's box, wrap each glass in a bit of bubble wrap, shove them back in the box so it now didn't close properly and looked tatty, and then put that in a delivery box. No extra padding. So both boxes look like they've been stomped on.
It's an Ebay shop. I've messaged them and sent (asked-for) photos. So far I've been offered a refund (I assume of the broken ones) or replacement.
That doesn't help with the present aspect.
What should I expect them to do? All discussion has been through Ebay messaging and they are perfectly pleasant. (no apology for duff packaging though!)