There are plenty of good routers at the budget end of the market. The Silverline 264895 faired well in our reviews, as did the Bosch POF 1200 AE.  There are cheaper routers, but you shouldn't only think about cost. You’re far better off getting a good deal on a mid-range model like the Bosch POF 1200 AE than forking out £50 for something unsuitable.