HI mate, sorry i couldnt get on earlier I have been installing fooking P4's all day, (I should have nicked ya one lol)
Second hand I have been looking and for a P4 1.7ghz, you are looking to pay in the region of £150-£200 notes, for anew barebones system, (no monitor, software etc) you can expect to pay upwards of £250-£300.
have a look here at this
http://cgi.ebay.co.uk/ws/eBayISAPI.d...126773364&rd=1
I think the best thing to do if your on a budget is look for a system which dont have a monitor or keyboard, the shitter the software the better. becuase i can give your a 17inch monitor for free if needed, plus i can sort you any software fro free if needed, so tis worth looking for that. there are some good P4s on ebay for £300 nnotes, but you dont say what your budget is. I cant build you one cos i dont have the time at the mo, Jim may knock one toghether, but you may find it cheaper to get a second hand P4 rather than source all new components