It could have been £300 and you will still complain and be the sucker for paying for that. Is the seller obligated to ship to you at a price of £2?
You could probably shop around a bunch of Oxfams to (maybe) get the book you wanted for cheap. Or you could also find discounted books at the Oxfam and list them for just £1 or 2 above the sticker price. Is that worth your time?
Like I get being upset at institutional practices like soft drinks costing companies a handful of pence per item when they charge £2.50 (or £4.50 at the cinema), and being stingy on the refills. Books on the other hand are a luxury item that (other than the textbook racket by publishers) you can go without.