I posted earlier today (mistakenly) about Amazon being down. It turns out one of my network filter lists had updated and was causing my problem. Checked my #pi-hole logs, and it was blocking:
www.amazon.com
and
unagi-na.amazon.com
The first was obvious, but the second must be part of their regional CDN or something. Not sure why those domains were put on an ad filter list.
Anyway, lesson learned.
Always check your filters first, kids.
@voltronic have an IT problem I haven't resolved yet, my skills are not what they used to. I will keep trying tomorrow