Well, as far as I know Dell don't actually make printers so this must be someone elses (Lexmark?) rebadged by Dell. The price listed on the Dell website is £43.16 including VAT. If it is a rebadged Lexmark then I would expect the replacement ink cartridges to be horrendous. From my experience of Lexmark printers it is cheaper to buy a new printer than to replace the ink. I could not recommend a Lexmark regardless of who's name is on it.
Thanks daconner, I do not have this printer but was tempted when I first read the offer now however I would not touch it for free, the compatibles at your link are £15.99 & 17.99 for black & colour respectivly. For my present Epsom 680 I can get 2 black and 2 colour for £11.95 from click here