I read this on the AP website too.

So I have contacted my buyer and explained that her item will travel by regular mail envelope and as such cannot be delivered to her parcel locker.

I asked her to provide and alternative address or to pay for an upgrade to parcel post.

She has replied with an alternate address.

I realise that this is not from PayPal but since we mail our stuff by large letter then we don't get seller protection anyway.