what are some general pointers, should I only go for 99% feedbacked?
but heard the other day someone mentioned they rather a 97-98% seller with 10,000 feedback, than a 99% seller with 5,000 feedback, and some agreed. Or something like that but I can't find the comment again.
your thoughts about this? general guide?
Depends on the item.
Personally:
If it's like a ~$5 cable or something, I'll just buy from someone with at least ~100-1000 feedback in Australia. I don't want to wait 3 weeks for delivery, happy to pay 50 cents more or whatever. Don't care about percentage.
If it's a $100+ brand new item I'll buy from someone with at least ~1000 feedback, judge the negative feedback on a case by case basis, and favour any sellers who are legit in Australia.
If it's a $100+ second hand item I'll buy from someone with at least ~100 feedback, zero negative (unless the seller has replied to the negative feedback with an explanation), only in Australia, has what appears to be a legit description of the second hand item (and not a copy and paste from the manufacturer), has actual photos of the item (and not just stock images) and then I'll do a quick reverse image search to make sure they're genuine pics of the item and haven't been pinched from somewhere else.