you know its really hard to say for the price
7" ANDROID TABLET PC EPAD APAD WIFI CAM HDMI DUAL CORE | eBay UK
£100 Sounds good doesn't it? It appears that there are many different types of basically the same machine. Some say they have 800MHZ singlecore processor(like a pc from late 90's or so) and this one
apparently has a dualcore processor, should be a lot better but i wouldn't trust these things as far as i could throw them. Look how many of these sellers have of these... "more than 10 available" I think you would have a headache buying one of these.
If an E-Reader is all you want, then go with the new Kindle. Everybody I know that has one loves them to bits.