This buyer has purchased from me quite a few times before and there has never been a question about postage.   She says she received "a notice" that says postage for 10 or more items is free.  Doesn't make sense.  The seller sets the postage, not the buyer.  Anyway, I've asked for a screen shot.

Is she perhaps confusing an ebay promotion message about free postage?

Many members read what they want to read when it comes to getting freebies.

That could be the misunderstanding.  It will be interesting to see if she sends me the page shot.

The buyer copied and pasted the page.  Here is the relevant section;

Free shipping. Your order contained more than 10 items. Thank you! Please view order details in My eBay for a complete summary.

I'll call eB about this.

It sounds very much like an ebay promotion on the US site.  It may be that when the buyer pays your invoice ebay will pick up the postage component and you will get the full amount.

In Australia the promotions will not cover postage so the trick is to buy Free postage items so ebay does actually cover it.

In the USA there is a far bigger takeup of Free postage I believe so this sort of promotion will not cost them as much but makes the buyer feel good.

It will be interesting to see what the answer is when you contact them.

Thank you and I will post the eBay explanation.

Just called eBay and was put through to ebay.com.  They checked and said this was not a legitimate eBay communication and must have gone to the seller's email and not to her ebay address.  In that case, it might be a phishing scam.. They suggested I contact the buyer and ask her to call them.  Will do that.