If you were living in North America it wouldn't be hard to find a cheap second
hand prs-500 on ebay... Unfortunately, as you probably know the european
ebook second hand market is scarce and american ebayers seldom ship
worldwide...
Anyway, currently the cheapest reader is the Cybook sold by W.H Smith
in the UK (180£), and there is a nice guy from this board who is willing
to forward them to non-UK people, see here :
https://www.mobileread.com/forums/sho...t=28723&page=5