I have the original 7 inch Kobo Arc - there is an ongoing very good deal on ebay.co.uk where curry's are selling new stock at £80, with 64GB .
http://www.ebay.co.uk/itm/Kobo-Arc-7...item1c3c79731d
beware there is the 7 inch arc and then also the 7 inch arc7 ( faster processor but lower spec display, slightly smaller case). see here
http://goodereader.com/blog/electron...-7-vs-kobo-arc