@adlinkpen
When I was selling here I was mainly selling models. I used to get a fair few combined requests and I used to use the system above.
If a buyer contacts you first saying they want x, y and z no refund is required. If you leave a note in description saying they should contact you first if they want more than 1 of your listings that might work. It did for me.
If they buy, then yes, refunds are required.
& you didn't (*I'll get to this) need to create a hidden listing. Just price it higher to deter others and leave offers open for the real price which only your buyer knows.
*Before that was easy, with BPF you need to run the sums.
It isn't ideal but it will let your buyers get what they want at a reduced postage price.
If you wait for eBay to fix this I think there's a fair chance you will be waiting for a very long time/forever as it looks like it is the BPF fees that have caused the problem.
We've seen examples of combined invoices where the buyer is paying BPF for every single item in it.
It's a "BUYER" protection fee not an "ITEM" protection fee. So they can't actually allow what the system is doing. It's almost certainly illegal.
& it's far easier to shut down the area where this becomes apparent than it will be trying to fix it.
