But I think the point is that a bidder accepts the item and shipping cost before they place the bid, whether or not you know if the shipping price is 100% accurate.
I dont get this dont bid if you dont like the price thing. I would have no idea how much items weigh and therefore have no idea how much p&p is appropriate until the package arrived.
as much as she did overcharge, you also used feedback extortion which can get you account restricted
i would let it go tbh.
This is why i have weighing scales, then i add a £1 on for packaging and my stars are 5 out of 5 for p&p.
V xx