ok i have a bit of a dilemma

i have been wanting a focus st for ages now and the prices are finaly coming in to my budget.

heres what im looking at
http://www.arnoldclark.com/used-cars...f/arnas-28142/

to replace my 03 plate 1.8 mp3 model focus

mines done 78000 so the miledge is the same,its just thay are asking for 248pm when i have been told by a freind that he paid less when he got his fiesta st.
he was only paying 170pm aparently.

so looking for the pros and cons of this as i realy want one but want all the facts first lol

cherrs john