Nikon 18-70mm (new) - £149 from Jessops:
http://www.jessops.com/online.store...ops.com/online.store/products/27836/Show.html
Nikon D3000 (new) - £289.99 from
Park Cameras:
http://www.parkcameras.com/12661/Nikon-D3000-Body.html?referrer=CamPriceBust
The D3000 is a newer model than the D70 - it's got a 10.2MP sensor as opposed to the D70's 6MP. Here's a reliable review:
http://www.dpreview.com/reviews/nikond3000/page26.asp (see pages 1-25 as well).
The eBay D70/18-70 combo is probably a reasonably good buy, but personally I'd rather go for brand new kit. If you're at all unsure - my advice would be don't rush in, do more reading up and go to a shop to try out the D3000 in the flesh.
Btw, here's a good price checker for new gear -
http://www.camerapricebuster.co.uk/prod1166.html. Use selector in left column to get from bodies to lenses.